Mainshaft Disassembly, Reassembly, and Inspection
Special Tools Required
Image Description/Tool Number
310166.png Driver Handle, 40 mm I.D. 07746-0030100
609759.png Driver, 30 mm I.D. 07946-MB00000

NOTE: enu_12713377_2.0Where icon is shown, click for further information.


1


4193_3.0_enu_14103432_3.0

enu_12713377_2.0
Detailed information, notes, and precautions
enu_12714524_1.0
Replace

1. Ball Bearing - Remove
1.
Support 6th gear (A) on steel blocks, and press the mainshaft out of the angular ball bearing (B) using an attachment (C) and a press (D).
NOTE: Do not use a jaw-type puller; it can damage the gear teeth.

2. 6th Gear - Remove


3. Needle Bearing - Remove


4. 6th Gear Distance Collar - Remove


5. Synchro Ring - Remove


6. Synchro Spring - Remove


7. 5th/6th Synchro Sleeve - Remove


8. 5th/6th Synchro Hub - Remove
1.
Support 5th gear (A) on steel blocks, and press the mainshaft out of the 5th/6th synchro hub (B) using an attachment (C) and a press (D).
NOTE: Do not use a jaw-type puller; it can damage the gear teeth.

9. Synchro Spring - Remove


10. Synchro Ring - Remove


11. 5th Gear - Remove


12. Needle Bearing - Remove


13. 4th/5th Gear Distance Collar - Remove


14. Needle Bearing - Remove


15. 4th Gear - Remove


16. Synchro Ring - Remove


17. Synchro Spring - Remove


18. 3rd/4th Synchro Sleeve - Remove


19. 3rd/4th Synchro Hub - Remove
1.
Support 3rd gear (A) on steel blocks, and press the mainshaft out of the 3rd/4th synchro hub (B) and 3rd gear using an attachment (C) and a press (D).
NOTE: Do not use a jaw-type puller; it can damage the gear teeth.

20. Synchro Spring - Remove


21. Synchro Ring - Remove


22. 3rd Gear - Remove


23. Needle Bearing - Remove


24. Angular Ball Bearing - Remove
1.
Support the angular ball bearing (A) on steel blocks, and press out the mainshaft using an attachment (B) and a press (C).

1. Mainshaft - Inspect
1.
Inspect the oil passage, gear, and bearing contact areas for wear and damage, then measure the mainshaft at points A, B, C, D, E, and F. If any part of the mainshaft is less than the service limit, replace it.

 
Measurement
Standard
Service Limit
A
Ball Bearing Contact Area
(Transmission Housing Side)
30.984?31.000 mm (1.21984?1.22047 in)
30.984 mm (1.21984 in)
B
6th Gear Distance Collar Contact Area
32.984?33.000 mm (1.29858?1.29921 in)
32.984 mm (1.29858 in)
C
4th/5th Gear Distance Collar
Contact Area
35.984?36.000 mm (1.41669?1.41732 in)
35.984 mm (1.41669 in)
D
Needle Bearing Contact Area
41.984?42.000 mm (1.65291?1.65354 in)
41.984 mm (1.65291 in)
E
Ball Bearing Contact Area
(Clutch Housing Side)
28.002?28.015 mm (1.10244?1.10295 in)
28.002 mm (1.10244 in)
F
Flywheel Pilot Bushing
Contact Area
20.80?20.85 mm (0.8189?0.8209 in)
20.80 mm (0.8189 in)
2.
Inspect the runout by supporting both ends of the mainshaft. Then rotate the mainshaft two complete turns while measuring with a dial gauge. If the runout exceeds the standard, replace the mainshaft.
Standard:
0.02 mm (0.0008 in) max.


NOTE:
enu_12713377_2.0Where icon is shown, click for further information.
Clean all parts in solvent, dry them, and apply MTF to all contact surfaces.


1


4193_3.0_enu_14103433_3.0

enu_12713377_2.0
Detailed information, notes, and precautions
enu_12714524_1.0
Replace

1. Angular Ball Bearing - Install
1.
Press in the angular ball bearing (A) using the 30 mm I.D. driver and a press (B).
NOTE: Check the ball bearing install direction.

2. Needle Bearing - Install


3. 3rd Gear - Install


4. Synchro Ring - Install


5. Synchro Spring - Install


6. 3rd/4th Synchro Hub - Install
1.
Install the 3rd/4th synchro hub (A) by aligning the synchro ring fingers (B) with the grooves (C) in the 3rd/4th synchro hub.
NOTE: Make sure to install the 3rd/4th synchro hub in the direction shown.
2.
Press on the 3rd/4th synchro hub (A) using the 40 mm I.D. driver handle and a press (B).

7. 3rd/4th Synchro Sleeve - Install
1.
Install the 3rd/4th synchro sleeve (A) by aligning the stops (B) of the 3rd/4th synchro sleeve and the 3rd/4th synchro hub.


8. Synchro Spring - Install


9. Synchro Ring - Install
1.
Install the synchro ring (A) by aligning the synchro ring fingers (B) with the grooves in 3rd/4th synchro hub (C).

10. 4th Gear - Install


11. Needle Bearing - Install


12. 4th/5th Gear Distance Collar - Install


13. Needle Bearing - Install


14. 5th Gear - Install


15. Synchro Ring - Install


16. Synchro Spring - Install


17. 5th/6th Synchro Hub - Install
1.
Install the 5th/6th synchro hub (A) by aligning the synchro ring fingers (B) with the grooves (C) in the 5th/6th synchro hub.
2.
Press on the 5th/6th synchro hub (A) using the 40 mm I.D. driver handle and a press (B).

18. 5th/6th Synchro Sleeve - Install
1.
Install the 5th/6th synchro sleeve (A) by aligning the slots of the 5th/6th synchro sleeve and the 5th/6th synchro hub (B).
NOTE: Make sure to align the slots in the 5th/6th synchro sleeve as shown.


19. Synchro Spring - Install


20. Synchro Ring - Install
1.
Install the synchro ring (A) by aligning the synchro ring fingers (B) with the grooves (C) in the 5th/6th synchro hub.

21. 6th Gear Distance Collar - Install


22. Needle Bearing - Install


23. 6th Gear - Install


24. Ball Bearing - Install
1.
Press on a angular ball bearing (A) using the 40 mm I.D. driver handle and a press (B).
NOTE: Check the ball bearing install direction.