Inspect the transmission range switch.

Check for a loose shift cable at the shift lever and the transmission control lever.

Inspect the clearance between the forward clutch end-plate and the top disc. If the clearance is out of tolerance, replace the forward clutch assembly.

Inspect the reverse brake piston and the O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the brake end-plate and the top disc. If the clearance is out of tolerance, inspect the brake discs and plates for wear and damage. If the discs and plates are worn or damaged, replace them as a set. If they are OK, adjust the clearance with the brake end-plate.

Check the sun gear for wear and damage. If the sun gear is worn or damaged, replace it and also check the planetary carrier pinion gears, the forward clutch, and the drive pulley shaft splines for wear and damage.

Check the manual valve lever and lever pin for wear and damage.

Check the secondary valve body for wear and damage.

Check the linear solenoid valve body for wear and damage.

Check the clutch reducing valve body for wear and damage.

Check the stator shaft for wear and damage.