A/T System Symptom Troubleshooting Index
NOTE: Do an all DTC check with the HDS, and troubleshoot any DTCs first before following the repair procedures listed in the index.

Electrical System Symptom Troubleshooting
Symptom
Probable cause(s)
Notes
When you press the engine start/stop button to select the ON mode, the A/T gear position indicator displays an improper indication, or it never displays at all
F-CAN communication line error
Gauge control module defective
PCM defective
A/T gear position indicator does not indicate with the shift lever in that position
F-CAN communication line error
Gauge control module defective
Transmission range switch defective or out of adjustment
PCM defective
Shift indicator does not work
F-CAN communication line error
Gauge control module defective
Transmission range switch defective
PCM defective
When you press the paddle shifter + (upshift switch) in D and S, the transmission does not upshift
A problem in the paddle shifter + (upshift switch) circuit
Check the paddle shifter + (upshift switch) circuit.
When you press the paddle shifter - (downshift switch) in D and S, the transmission does not downshift
A problem in the paddle shifter - (downshift switch) circuit
Check the paddle shifter - (downshift switch) circuit.
Shift lever cannot be moved from P while pressing on the brake pedal
Shift lock solenoid defective
Shift lock solenoid control circuit
Shift lock mechanism defective
Brake pedal position switch circuit
Brake pedal position switch defective
Transmission range switch ATPP switch stuck OFF
Transmission range switch ATPP switch line opened
Accelerator pedal position sensor circuit
Accelerator pedal position sensor defective
Relative throttle position sensor value too high
Throttle body defective
M indicator does not come on even though the paddle shifter is operated in sequential shift mode.
F-CAN communication line error
Gauge control module defective
PCM defective
Transmission range switch defective
HDS does not communicate with the PCM
DLC circuit error
Troubleshooting the DLC circuit.

Hydraulic/Mechanical System Symptom Troubleshooting
Symptom
Probable cause(s)
Notes
Engine runs, but vehicle does not move in any gear
Transmission range switch broken or out of adjustment
Shift cable broken or out of adjustment
Connection between shift cable and transmission or shift lever is worn
Drive plate defective or transmission incorrectly installed
Torque converter clutch piston defective
Torque converter defective
Low ATF level
ATF pump worn or binding
Main regulator valve stuck or spring worn
Foreign material in separator plate orifice
Manual valve defective
ATF strainer clogged
Torque converter regulator valve defective
Mainshaft worn or damaged
Countershaft worn or damaged
Final gears worn or damaged
Park mechanism defective
Selector control shaft worn or damaged
Axle disengaged
Inspect the transmission range switch. If the transmission range switch fails the inspection, replace the switch. If the inspection is OK, check for proper transmission range switch installation, and adjust the shift cable.
Check for a loose shift cable at the shift lever and the selector control lever.
Check for an incorrectly installed transmission, and check the drive plate for wear and damage. Replace the drive plate if it is worn or damaged.
Replace the torque converter.
Check the ATF level, and check the ATF cooler lines for leaks and loose connections. If necessary, clean the ATF cooler lines.
Check the stall speed.
Check the line pressure.
Improper alignment of the ATF pump and the torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
Check the main regulator valve in the regulator valve body for free movement, and check the valve springs for wear and damage.
Check for a clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
Check the manual valve in the manual valve body for wear and damage, and check the manual lever guide pin for wear and damage.
Check the ATF strainer for debris. If the strainer is clogged, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
Check the torque converter regulator valve in the regulator valve body for free movement, and check the valve spring for wear and damage.
Inspect the differential pinion gears for wear. If the differential pinion gears are worn, replace the differential assembly, replace the ATF strainer, thoroughly clean the transmission, and clean the ATF cooler lines.
Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will cause ATF pump seizure, use the proper tools.
Install the main seal flush with the torque converter housing. If you push it into the torque converter housing until it bottoms out, it will block the fluid return passage and result in damage.
Inspect the mainshaft and the countershaft for wear and damage.
Inspect the park mechanism at the park lever link and park gear.
Check the axles.
Vehicle moves in R, but not in D or S
Transmission range switch broken or out of adjustment
Shift cable broken, binding, or out of adjustment
Connection between shift cable and transmission or shift lever is worn
Manual valve defective
1st accumulator defective
Idler gears worn or damaged
Inspect the transmission range switch. If the transmission range switch fails the inspection, replace the switch. If the inspection is OK, check for proper transmission range switch installation, and adjust the shift cable.
Check for a loose shift cable at the shift lever and the selector control lever.
Check the manual valve in the manual valve body for wear and damage, and check the manual lever guide pin for wear and damage.
Check the 1st accumulator piston, the O-ring, and the spring in the manual valve body for wear and damage.
Inspect the mainshaft, the countershaft, the secondary shaft, the third shaft, and idler gears for wear and damage.
Vehicle moves in D and S, but not in R (or moves forward in R)
Transmission range switch broken or out of adjustment
Shift cable broken, binding, or out of adjustment
Connection between shift cable and transmission or shift lever is worn
Shift fork shaft stuck
Manual valve defective
4th accumulator defective
4th clutch defective
Reverse gears worn or damaged
Reverse idler gear shaft/holder worn or damaged
Reverse selector or reverse selector hub worn or damaged
Inspect the transmission range switch. If the transmission range switch fails the inspection, replace the switch. If the inspection is OK, check for proper transmission range switch installation, and adjust the shift cable.
Check for a loose shift cable at the shift lever and the selector control lever.
Check for a missing shift fork bolt on the shift fork shaft.
Check the shift fork shaft detent for wear and damage.
Check the manual valve in the manual valve body for wear and damage, and check the manual lever guide pin for wear and damage.
Check the 4th accumulator piston, the O-ring, and the spring in the regulator valve body for wear and damage.
Check the 4th clutch pressure.
Inspect the clutch clearance for the 4th clutch.
Inspect the reverse idler gear shaft/holder for wear and damage.
Inspect the reverse selector gear teeth chamfers, and inspect the engagement teeth chamfers of the third shaft reverse gear and the reverse selector hub. Replace the reverse gears and the reverse selector if they are worn or damaged. If the transmission makes clicking, grinding, or whirring noises, also replace the third shaft 4th gear, the reverse idler gear, the mainshaft 3rd gear, and the countershaft 2nd gear.
Poor acceleration; engine revs up abnormally high when starting off in D, S, and R
A/T clutch pressure control solenoid valve D defective
Output shaft (countershaft) speed sensor defective
Torque converter one-way clutch defective
Low ATF level
ATF pump worn or binding
Main regulator valve stuck or spring worn
ATF strainer clogged
Stator shaft worn or damaged
Inspect A/T clutch pressure control solenoid valve D with the HDS.
Check the output shaft (countershaft) speed sensor installation.
Inspect the output shaft (countershaft) speed sensor O-ring for wear and damage.
Check the stall speed.
Replace the torque converter.
Check the ATF level. If the level is below the lower level, check the ATF cooler lines for leaks and loose connections. If necessary, clean the ATF cooler lines.
Check the line pressure.
Improper alignment of the ATF pump and the torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
Check the main regulator valve in the regulator valve body for free movement, and check the valve springs for wear and damage.
Check the ATF strainer for debris. If the strainer is clogged, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
Check the stator shaft splines for wear and damage.
Poor acceleration; engine revs up abnormally high when starting off in D, S, and R; stall speed high in D and S
Drive plate defective or transmission incorrectly installed
Torque converter clutch piston defective
Torque converter defective
1st accumulator defective
1st clutch defective
2nd clutch defective
Check for an incorrectly installed transmission, and check the drive plate for wear and damage. Replace the drive plate if it is worn or damaged.
Check the stall speed in R.
Replace the torque converter.
Check the 1st and 2nd clutch pressures.
Inspect the clutch clearance for the 1st and 2nd clutches.
Check the 1st accumulator piston, the O-ring, and the spring in the manual valve body for wear and damage.
Poor acceleration; engine revs up abnormally high when starting off in D, S, and R; stall speed high in R
Drive plate defective or transmission incorrectly installed
Torque converter clutch piston defective
Torque converter defective
4th accumulator defective
4th clutch defective
Check for an incorrectly installed transmission, and check the drive plate for wear and damage. Replace the drive plate if it is worn or damaged.
Check the stall speed in R.
Replace the torque converter.
Check the 4th clutch pressure.
Inspect the clutch clearance for the 4th clutch.
Check the 4th accumulator piston, the O-ring, and the spring in the regulator valve body for wear and damage.
Poor acceleration; engine revs up abnormally high when starting off in D, S, and R; stall speed low
Engine output low
Torque converter clutch piston defective
Check the stall speed.
Replace the torque converter.
Check the engine control system.
Engine idle vibration
Engine output low
Torque converter clutch piston defective
Transmission or engine mount defective
Check the stall speed.
Replace the torque converter.
Check the engine control system.
Check the line pressure.
Improper alignment of the ATF pump and the torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
Inspect the transmission or engine mount.
Inspect the valve clearance.
Vehicle moves in N
Shift solenoid valve C defective
Line pressure solenoid valve A defective
ATF temperature sensor defective
Low ATF level
Excessive ATF
Main regulator valve stuck or spring worn
Foreign material in separator plate orifice
Lubrication regulator valve defective
Lubrication shift valve defective
Lock-up shift valve defective
1st clutch defective
2nd clutch defective
3rd clutch defective
4th clutch defective
5th clutch defective
6th clutch defective
Clearance between clutch end-plate and top disc incorrect
Needle bearings seized, worn, or damaged
Inspect the shift solenoid valve C function with the HDS.
Check for a seized shift solenoid valve, and inspect the O-rings.
Inspect the line pressure solenoid valve A function with the HDS.
Check for a seized line pressure solenoid valve A, and inspect the O-rings.
Check the ATF level. If the level is below the lower level, check the ATF cooler lines for leaks and loose connections. If necessary, clean the ATF cooler lines.
Check the ATF level. If the level is above the upper level, drain the ATF if it is over-filled.
Check the ATF temperature sensor O-ring for wear and damage.
Check the main regulator valve in the regulator valve body for free movement, and check the valve springs for wear and damage.
Check all clutch pressures.
Check for a clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
Check the lubrication regulator valve, the lubrication shift valve, and the lock-up shift valve in the main valve body for free movement, and check the valve springs for wear and damage.
Check the stall speed.
Inspect the clutch clearance for all clutches.
Check the needle bearings on all shafts for seizure, wear, and damage.
Delayed engagement after shifting from N to D or S, or excessive shock when shifting
Shift solenoid valve C defective
A/T clutch pressure control solenoid valve D defective
Shift cable broken or out of adjustment
Connection between shift cable and transmission or shift lever is worn
ATF temperature sensor defective
Low ATF level
Foreign material in separator plate orifice
1st accumulator defective
ATF strainer clogged
Lock-up shift valve defective
1st clutch defective
Clearance between clutch end-plate and top disc incorrect
Inspect the shift solenoid valve C function with the HDS.
Check for a seized shift solenoid valve, and inspect the O-rings.
Inspect A/T clutch pressure control solenoid valve D with the HDS.
Check for a loose shift cable at the shift lever and the selector control lever.
Inspect the ATF temperature sensor O-ring for wear and damage.
Check the ATF level. If the level is below the lower level, check the ATF cooler lines for leaks and loose connections. If necessary, clean the ATF cooler lines.
Check for a clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
Check the stall speed.
Check the line pressure.
Check the ATF strainer for debris. If the strainer is clogged, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
Check the lock-up shift valve in the main valve body for free movement, and check the valve spring for wear and damage.
Check the 1st clutch pressure.
Inspect the clutch clearance for the 1st clutch.
Check the 1st accumulator piston, the O-ring, and the spring in the manual valve body for wear and damage.
Delayed engagement after shifting from N to R, or excessive shock when shifting
Shift solenoid valve C defective
A/T clutch pressure control solenoid valve D defective
Shift cable broken, binding, or out of adjustment
Connection between shift cable and transmission or shift lever is worn
ATF temperature sensor defective
Foreign material in separator plate orifice
Shift valve C defective
Reverse inhibitor valve defective
4th accumulator defective
4th/reverse air check valve stuck
ATF strainer clogged
Lock-up shift valve defective
4th clutch defective
Clearance between clutch end-plate and top disc incorrect
Inspect the shift solenoid valve C function with the HDS.
Check for a seized shift solenoid valve, and inspect the O-rings.
Inspect A/T clutch pressure control solenoid valve D with the HDS.
Check for a loose shift cable at the shift lever and the selector control lever.
Inspect the ATF temperature sensor O-ring for wear and damage.
Check for a clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
Check the stall speed.
Check the line pressure.
Check the ATF strainer for debris. If the strainer is clogged, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
Check the lock-up shift valve, shift valve C, and the reverse inhibitor valve in the main valve body for free movement, and check the valve spring for wear and damage.
Check the 4th clutch pressure.
Inspect the clutch clearance for the 4th clutch.
Check the 4th accumulator piston, the O-ring, and the spring in the regulator valve body for wear and damage.
Check for a stuck 4th/reverse air check valve in the main valve body.
Transmission does not shift
A/T clutch pressure control solenoid valve A defective
A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Output shaft (countershaft) speed sensor defective
Inspect A/T clutch pressure control solenoid valve A with the HDS.
Inspect A/T clutch pressure control solenoid valve B with the HDS.
Inspect A/T clutch pressure control solenoid valve C with the HDS.
Check the output shaft (countershaft) speed sensor installation.
Inspect the output shaft (countershaft) speed sensor O-ring for wear and damage.
Excessive shock or engine revs up abnormally high on all upshifts and downshifts
A/T clutch pressure control solenoid valve A defective
A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Input shaft (mainshaft) speed sensor defective
Output shaft (countershaft) speed sensor defective
ATF temperature sensor defective
Low ATF level
ATF pump worn or binding
Main regulator valve stuck or spring worn
Foreign material in separator plate orifice
1st accumulator defective
ATF strainer clogged
Clearance between clutch end-plate and top disc incorrect
Inspect A/T clutch pressure control solenoid valve A with the HDS.
Inspect A/T clutch pressure control solenoid valve B with the HDS.
Inspect A/T clutch pressure control solenoid valve C with the HDS.
Check the speed sensor installation.
Inspect the speed sensor O-ring for wear and damage.
Inspect the ATF temperature sensor O-ring for wear and damage.
Check the ATF level. If the level is below the lower level, check the ATF cooler lines for leaks and loose connections. If necessary, clean the ATF cooler lines.
Check the stall speed.
Check the line pressure.
Improper alignment of the ATF pump and the torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
Check the main regulator valve in the regulator valve body for free movement, and check the valve springs for wear and damage.
Check for a clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
Check the 1st accumulator piston, the O-ring, and the spring in the manual valve body for wear and damage.
Check the ATF strainer for debris. If the strainer is clogged, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
Inspect the clutch clearance for all clutches.
Excessive shock or engine revs up abnormally high on 1-2 upshift or 2-1 downshift
Shift solenoid valve A defective
A/T clutch pressure control solenoid valve A defective
A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Transmission fluid pressure switch A (2nd clutch) defective
Foreign material in separator plate orifice
A/T clutch pressure control solenoid valve A accumulator defective
2nd air check valve stuck
2nd clutch defective
Clearance between clutch end-plate and top disc incorrect
Inspect the shift solenoid valve A function with the HDS.
Check for a seized shift solenoid valve, and inspect the O-rings.
Inspect A/T clutch pressure control solenoid valve A with the HDS.
Inspect A/T clutch pressure control solenoid valve B with the HDS.
Inspect A/T clutch pressure control solenoid valve C with the HDS.
Check for a clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
Check the 2nd clutch pressure.
Inspect the clutch clearance for the 2nd clutch.
Check the A/T clutch pressure control solenoid valve A accumulator piston, the O-ring, and the springs in the secondary valve body for wear and damage.
Check for a stuck 2nd air check valve in the torque converter housing.
Excessive shock or engine revs up abnormally high on 2-3 upshift or 3-2 downshift
Shift solenoid valve A defective
Shift solenoid valve B defective
A/T clutch pressure control solenoid valve A defective
A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Transmission fluid pressure switch B (3rd clutch) defective
Foreign material in separator plate orifice
A/T clutch pressure control solenoid valve A accumulator defective
A/T clutch pressure control solenoid valve B accumulator defective
2nd air check valve stuck
3rd air check valve stuck
2nd clutch defective
3rd clutch defective
Clearance between clutch end-plate and top disc incorrect
Inspect the shift solenoid valves A and B function with the HDS.
Check for a seized shift solenoid valve, and inspect the O-rings.
Inspect A/T clutch pressure control solenoid valve A with the HDS.
Inspect A/T clutch pressure control solenoid valve B with the HDS.
Inspect A/T clutch pressure control solenoid valve C with the HDS.
Check for a clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
Check the 2nd and 3rd clutch pressures.
Inspect the clutch clearance for the 2nd and 3rd clutches.
Check the A/T clutch pressure control solenoid valve A and B accumulator pistons, the O-rings, and the springs in the secondary valve body for wear and damage.
Check for a stuck 2nd air check valve in the torque converter housing.
Check for a stuck 3rd air check valve in the stator shaft support.
Excessive shock or engine revs up abnormally high on 3-4 upshift or 4-3 downshift
Shift solenoid valve B defective
A/T clutch pressure control solenoid valve A defective
A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Transmission fluid pressure switch C (4th clutch) defective
Shift fork shaft stuck
Foreign material in separator plate orifice
Shift valve C defective
Reverse inhibitor valve defective
D inhibitor valve defective
A/T clutch pressure control solenoid valve B accumulator defective
A/T clutch pressure control solenoid valve C accumulator defective
3rd air check valve stuck
4th/reverse air check valve stuck
3rd clutch defective
4th clutch defective
Clearance between clutch end-plate and top disc incorrect
Inspect the shift solenoid valve B function with the HDS.
Check for a seized shift solenoid valve, and inspect the O-rings.
Inspect A/T clutch pressure control solenoid valve A with the HDS.
Inspect A/T clutch pressure control solenoid valve B with the HDS.
Inspect A/T clutch pressure control solenoid valve C with the HDS.
Check for a missing shift fork bolt on the shift fork shaft.
Check the shift fork shaft detent for wear and damage.
Check for a clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
Check shift valve C, the reverse inhibitor valve, and the D inhibitor valve in the main valve body for free movement, and check the valve spring for wear and damage.
Check the 3rd and 4th clutch pressures.
Inspect the clutch clearance for the 3rd and 4th clutches.
Check the A/T clutch pressure control solenoid valve B and C accumulator pistons, the O-rings, and the springs in the secondary valve body for wear and damage.
Check for a stuck 3rd air check valve in the stator shaft support.
Check for a stuck 4th/reverse air check valve in the main valve body.
Excessive shock or engine revs up abnormally high on 4-5 upshift or 5-4 downshift
Shift solenoid valve A defective
A/T clutch pressure control solenoid valve A defective
A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Transmission fluid pressure switch D (5th clutch) defective
Shift fork shaft stuck
Foreign material in separator plate orifice
Shift valve C defective
Reverse inhibitor valve defective
D inhibitor valve defective
A/T clutch pressure control solenoid valve A accumulator defective
A/T clutch pressure control solenoid valve C accumulator defective
4th/reverse air check valve stuck
5th air check valve stuck
4th clutch defective
5th clutch defective
Clearance between clutch end-plate and top disc incorrect
Inspect the shift solenoid valve A function with the HDS.
Check for a seized shift solenoid valve, and inspect the O-rings.
Inspect A/T clutch pressure control solenoid valve A with the HDS.
Inspect A/T clutch pressure control solenoid valve B with the HDS.
Inspect A/T clutch pressure control solenoid valve C with the HDS.
Check for a missing shift fork bolt on the shift fork shaft.
Check the shift fork shaft detent for wear and damage.
Check for a clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
Check shift valve C, the reverse inhibitor valve, and the D inhibitor valve in the main valve body for free movement, and check the valve spring for wear and damage.
Check the 4th and 5th clutch pressures.
Inspect the clutch clearance for the 4th and 5th clutches.
Check the A/T clutch pressure control solenoid valve A and C accumulator pistons, the O-rings, and the springs in the secondary valve body for wear and damage.
Check for a stuck 4th/reverse air check valve in the main valve body.
Check for a stuck 5th air check valve in the torque converter housing.
Excessive shock or engine revs up abnormally high on 5-6 upshift or 6-5 downshift
Shift solenoid valve A defective
Shift solenoid valve B defective
A/T clutch pressure control solenoid valve A defective
A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Transmission fluid pressure switch E (6th clutch) defective
Foreign material in separator plate orifice
A/T clutch pressure control solenoid valve A accumulator defective
A/T clutch pressure control solenoid valve B accumulator defective
5th air check valve stuck
6th air check valve stuck
5th clutch defective
6th clutch defective
Clearance between clutch end-plate and top disc incorrect
Inspect the shift solenoid valves A and B function with the HDS.
Check for a seized shift solenoid valve, and inspect the O-rings.
Inspect A/T clutch pressure control solenoid valve A with the HDS.
Inspect A/T clutch pressure control solenoid valve B with the HDS.
Inspect A/T clutch pressure control solenoid valve C with the HDS.
Check for a clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.
Check the 5th and 6th clutch pressures.
Inspect the clutch clearance for the 5th and 6th clutches.
Check the A/T clutch pressure control solenoid valve A and B accumulator pistons, the O-rings, and the springs in the secondary valve body for wear and damage.
Check for a stuck 5th air check valve in the torque converter housing.
Check for a stuck 6th air check valve in the stator shaft support.
Noise from transmission in all shift lever positions
ATF pump worn or binding
Lubrication regulator valve defective
Lubrication shift valve defective
Final gears worn or damaged
Idler gears worn or damaged
Thrust washers seized, worn or damaged
Mainshaft, countershaft, secondary shaft, and third shaft bearings worn or damaged
Check the line pressure.
Improper alignment of the ATF pump and the torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
Inspect the differential pinion gears for wear. If the differential pinion gears are worn, replace the differential assembly, replace the ATF strainer, thoroughly clean the transmission, and clean the ATF cooler lines.
Check the ATF strainer for debris. If the strainer is clogged, find the damaged components that caused the debris. If no cause for contamination is found, replace the torque converter.
Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will cause ATF pump seizure, use the proper tools.
Install the main seal flush with the torque converter housing. If you push it into the torque converter housing until it bottoms out, it will block the fluid return passage and result in damage.
Check the ball bearing for the mainshaft, the countershaft, the secondary shaft, and the third shaft.
Inspect the mainshaft, the countershaft, the secondary shaft, the third shaft, and idler gears for wear and damage.
Check the thrust washers on all shafts for seizure, wear, and damage.
Check the lubrication regulator valve and the lubrication shift valve in the main valve body for free movement, and check the valve springs for wear and damage.
Noise from transmission in D and S
A/T clutch pressure control solenoid valve A defective
A/T clutch pressure control solenoid valve B defective
A/T clutch pressure control solenoid valve C defective
Inspect A/T clutch pressure control solenoid valve A with the HDS.
Inspect A/T clutch pressure control solenoid valve B with the HDS.
Inspect A/T clutch pressure control solenoid valve C with the HDS.
Noise from transmission in R
Reverse gears worn or damaged
Inspect the reverse idler gear shaft/holder for wear and damage.
Inspect the reverse selector gear teeth chamfers, and inspect the engagement teeth chamfers of the third shaft reverse gear and the reverse selector hub. Replace the reverse gears and the reverse selector if they are worn or damaged. If the transmission makes clicking, grinding, or whirring noises, also replace the third shaft 4th gear, the reverse idler gear, the mainshaft 3rd gear, and the countershaft 2nd gear.
Vehicle does not accelerate above 34 mph (55 km/h)
Torque converter one-way clutch defective
Check the stall speed.
Replace the torque converter.
Vibration in all shift lever positions
Drive plate defective or transmission incorrectly installed
Torque converter clutch piston defective
Torque converter defective
ATF pump worn or binding
Transmission or engine mount defective
Low engine output (horsepower)
Check for an incorrectly installed transmission, and check the drive plate for wear and damage. Replace the drive plate if it is worn or damaged.
Check the stall speed.
Check the line pressure.
Improper alignment of the ATF pump and the torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
Inspect the differential pinion gears for wear. If the differential pinion gears are worn, replace the differential assembly, replace the ATF strainer, thoroughly clean the transmission, and clean the ATF cooler lines.
Replace the torque converter.
Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will cause ATF pump seizure, use the proper tools.
Inspect the transmission or engine mount.
Check the valve adjustment.
Check the engine control system.
Shift lever does not operate smoothly
Transmission range switch defective or out of adjustment
Shift cable broken, binding, or out of adjustment
Connection between shift cable and transmission or shift lever is worn
Manual valve defective
Selector control shaft worn or damaged
Inspect the transmission range switch. If the transmission range switch fails the inspection, replace the switch. If the inspection is OK, check for proper transmission range switch installation, and adjust the shift cable.
Check for a loose shift cable at the shift lever and the selector control lever.
Check the manual valve in the main valve body for wear and damage, and check the manual lever guide pin for wear and damage.
Transmission does not shift into P
Shift cable broken, binding, or out of adjustment
Connection between shift cable and transmission or shift lever is worn
Park mechanism defective
Check for a loose shift cable at the shift lever and the selector control lever.
Inspect the countershaft and the secondary shaft for wear and damage.
Inspect the park mechanism at the parking holder and park gears.
Torque converter clutch does not disengage
Shift solenoid valve C defective
Drive plate defective or transmission incorrectly installed
Torque converter clutch piston defective
Torque converter defective
Lock-up shift valve defective
Inspect the shift solenoid valve C function with the HDS.
Check for a seized shift solenoid valve, and inspect the O-rings.
Check for an incorrectly installed transmission, and check the drive plate for wear and damage. Replace the drive plate if it is worn or damaged.
Check the stall speed.
Check the line pressure.
Replace the torque converter.
Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will cause ATF pump seizure, use the proper tools.
Check the lock-up shift valve in the main valve body for free movement, and check the valve springs for wear and damage.
Torque converter clutch does not operate smoothly
A/T clutch pressure control solenoid valve D defective
Drive plate defective or transmission incorrectly installed
Torque converter clutch piston defective
Torque converter defective
Torque converter regulator valve defective
Lock-up control valve defective
Inspect A/T clutch pressure control solenoid valve D with the HDS.
Check the line pressure.
Check for an incorrectly installed transmission, and check the drive plate for wear and damage. Replace the drive plate if it is worn or damaged.
Check the stall speed.
Replace the torque converter.
Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will cause ATF pump seizure, use the proper tools.
Check the torque converter regulator valve and the lock-up control valve in the regulator valve body for free movement, and check the valve springs for wear and damage.
Torque converter clutch does not engage
Shift solenoid valve C defective
A/T clutch pressure control solenoid valve D defective
Drive plate defective or transmission incorrectly installed
Torque converter clutch piston defective
Torque converter defective
Torque converter regulator valve defective
Lock-up shift valve defective
Lock-up control valve defective
Inspect the shift solenoid valve C function with the HDS.
Check for a seized shift solenoid valve, and inspect the O-rings.
Inspect A/T clutch pressure control solenoid valve D with the HDS.
Check the line pressure.
Check for an incorrectly installed transmission, and check the drive plate for wear and damage. Replace the drive plate if it is worn or damaged.
Check the stall speed.
Replace the torque converter.
Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will cause ATF pump seizure, use the proper tools.
Check the torque converter regulator valve and the lock-up control valve in the regulator valve body for free movement, and check the valve springs for wear and damage.
Check the lock-up shift valve in the main valve body for free movement, and check the valve springs for wear and damage.
A/T gear position indicator does not indicate shift lever positions
Transmission range switch defective or out of adjustment
Shift cable broken, binding, or out of adjustment
Connection between shift cable and transmission or shift lever is worn
Inspect the transmission range switch. If the transmission range switch fails the inspection, replace the switch. If the inspection is OK, check for proper transmission range switch installation, and adjust the shift cable.
Check for a loose shift cable at the shift lever and the selector control lever.
Speedometer and odometer do not work
Output shaft (countershaft) speed sensor defective
Check the output shaft (countershaft) speed sensor installation.
Inspect the output shaft (countershaft) speed sensor O-ring for wear and damage.
Check for a poor connection at the output shaft (countershaft) speed sensor.
Engine does not start
Transmission range switch defective or out of adjustment
Shift cable broken, binding, or out of adjustment
Connection between shift cable and transmission or shift lever is worn
Drive plate defective or transmission incorrectly installed
Torque converter clutch piston defective
Torque converter defective
ATF pump worn or binding
Mainshaft worn or damaged
Inspect the transmission range switch. If the transmission range switch fails the inspection, replace the switch. If the inspection is OK, check for proper transmission range switch installation, and adjust the shift cable.
Check for a loose shift cable at the shift lever and the selector control lever.
Check for an incorrectly installed transmission, and check the drive plate for wear and damage. Replace the drive plate if it is worn or damaged.
Check the stall speed.
Check the line pressure.
Improper alignment of the ATF pump and the torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will cause ATF pump seizure, use the proper tools.
Replace the torque converter.
Inspect the mainshaft.
Engine stalls when shifted to D from N
Shift solenoid valve C defective
Drive plate defective or transmission incorrectly installed
Torque converter clutch piston defective
Torque converter defective
Torque converter regulator valve defective
Lock-up shift valve defective
Lock-up control valve defective
Inspect the shift solenoid valve C function with the HDS.
Check for a seized shift solenoid valve, and inspect the O-rings.
Check for an incorrectly installed transmission, and check the drive plate for wear and damage. Replace the drive plate if it is worn or damaged.
Check the stall speed.
Check the line pressure.
Improper alignment of the ATF pump and the torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will cause ATF pump seizure, use the proper tools.
Replace the torque converter.
Check the torque converter regulator valve and the lock-up control valve in the regulator valve body for free movement, and check the valve springs for wear and damage.
Check the lock-up shift valve in the main valve body for free movement, and check the valve springs for wear and damage.
Engine stops when shifted to R from N
Drive plate defective or transmission incorrectly installed
Torque converter clutch piston defective
Torque converter defective
Torque converter regulator valve defective
Lock-up shift valve defective
Lock-up control valve defective
Check for an incorrectly installed transmission, and check the drive plate for wear and damage. Replace the drive plate if it is worn or damaged.
Check the stall speed.
Check the line pressure.
Improper alignment of the ATF pump and the torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will cause ATF pump seizure, use the proper tools.
Replace the torque converter.
Check the torque converter regulator valve and the lock-up control valve in the regulator valve body for free movement, and check the valve springs for wear and damage.
Check the lock-up shift valve in the main valve body for free movement, and check the valve springs for wear and damage.
No engine braking
Shift cable broken, binding, or out of adjustment
Connection between shift cable and transmission or shift lever is worn
Output shaft (countershaft) speed sensor defective
Check for a loose shift cable at the shift lever and the selector control lever.
Check the output shaft (countershaft) speed sensor installation.
Inspect the output shaft (countershaft) speed sensor O-ring for wear and damage.
Engine does not rev to high rpm, and the transmission upshifts at low rpm (engine at normal operating temperature)
VTEC rocker arms defective
Low fuel pressure
Engine low on power
Check the engine rocker arms.
Monitor the fuel pressure when problem occurs.
Check the engine compression.
Check for a restricted exhaust.