1. Transmission Disassemble
Transmission Disassemble^ Tools Required
- J 8614-01 Pinion Flange Holder
- J 23907 Slide Hammer
- J 36825 Output Shaft Oil Seal Remover
- J 44707 T-Bar Push Puller
- J 44725 Gear Pack Assembly Fixture
- J 44726 2/3 Jaw Puller
- J 44730 Intermediate Case Puller Legs
1. Remove the drain plug and drain the transmission fluid.
2. Position the transmission on the floor with the output shaft up. Use boards in order to allow for the protrusion of the input shaft.
3. If the transmission is equipped with a Power Take-Off (PTO), remove the PTO.
4. Remove the shift control housing bolts.
5. Remove the shift control housing assembly.
6. For RWD transmission, using the J 8614-01, loosen the propeller shaft yoke nut.
7. For RWD transmission remove the propeller shaft yoke nut and discard.
8. Remove the propeller shaft yoke.
9. Remove the shift shaft detent sleeve and the shift shaft detent plunger.
9a. If RWD, remove the vehicle speed sensor (VSS) bolt and washer.
9b. Remove the VSS and 0-ring seal.
9c. Remove and discard the 0-ring seal.
10. Remove the 19 bolts retaining the rear case to the front case.
Important: Do not separate the rear case from the intermediate case by using a pry bar between the cases. The cases have machined sealing surfaces.
11. Remove the rear case.
^ Use a soft-face hammer and hit up on the rear case.
^ The cases should come apart once the sealer is broken.
^ There are 2 dowel pins that may bind in the rear case.
^ The main shaft rear bearing is a slip fit in the rear case and may bind if the case is not lifted up straight.
12. Remove the 2 bolts for the intermediate case.
13. Install the S-hooks in the webbing of the intermediate case to the locations shown.
Attach a suitable chain to the S-hooks.
14. Using a suitable lifting device, carefully remove the gear assembly from the front case.
Important: The weight of the gear assembly is extended over the edge of the workbench. The weight may tip over or overload a standard metal work bench.
15. Secure the J 44725 (1) to a sturdy workbench.
16. Position the gear assembly on the J 44725.
Notice: When removing the roll pins from the shift shafts use a punch that is a slightly smaller diameter than the roll pin. Flaring of the shift shaft groove may occur if the punch binds. This will result in extra effort to remove the shift forks or shift control levers. When double roll pins are used, remove both of the roll pins at the same time. Support the shift component when removing the roll pins to prevent damage to the shift shafts. Do not reuse the roll pins after removal.
17. Using a hammer and punch remove the roll pins from the internal shift control rear lever.
18. Remove the internal shift control rear lever.
19. Using a hammer and a punch remove the roll pins for the internal shift control front lever.
20. Remove the internal shift control front lever.
20.1. Turn the internal shift control front lever in order to clear the 2nd/3rd shift fork and the 4th/5th shift fork.
20.2. Remove the shift shaft with the internal shift control front lever.
21. Using the J 36825 (1) and the J 23907 (2) remove the 4 shift shaft detent plugs.
Important: Only remove the plungers as needed for replacement.
22. Remove the shift shaft detent springs and the shift shaft detent plungers. The plungers should only be removed if replacing the plungers. The plunges may be hard to come out now. After removing the shift shafts, the plungers will be easier to remove.
Notice: When removing the roll pins from the shift shafts use a punch that is a slightly smaller diameter than the roll pin. Flaring of the shift shaft groove may occur if the punch binds. This will result in extra effort to remove the shift forks or shift control levers. When double roll pins are used, remove both of the roll pins at the same time. Support the shift component when removing the roll pins to prevent damage to the shift shafts. Do not reuse the roll pins after removal.
Important: The 4th/5th shift fork and the 2nd/3rd shift fork do not require removal from the shift shafts for transmission disassembly. Do not remove the roll pins from the 4th/5th shift fork and the 2nd/3rd shift fork unless replacing the shift forks or the shift shafts.
23. Remove the following roll pins:
^ 6th gear shift fork (1)
^ 1st/reverse gear shift fork (2)
24. Remove the 6th gear shift fork and shaft.
24.1. Move the interlock plate in the 6th gear position by moving the plate towards the 1st/reverse shift shaft.
24.2. Pull up on the shift shaft while tapping down on the shift fork with a soft-faced hammer.
24.3. Remove the shift fork and shaft from the 6th gear synchronizer assembly.
25. Remove the 1st/reverse shift fork and shaft.
25.1. Move the interlock plate in the reverse gear shift position by moving the plate towards the 6th gear shift shaft.
25.2. Pull up on the shift shaft while tapping down on the shift fork with a soft-faced hammer.
25.3. Remove the shift fork and shaft from the 1st/reverse gear synchronizer hub.
26. If the vehicle is 4WD remove the retaining ring for the main shaft rear bearing.
27. Using the J 44726, remove the gears from the main shaft.
28. Remove the following from the main shaft:
28.1. Speed sensor reluctor wheel (RWD only) (1)
28.2. Main shaft rear bearing (2)
28.3. Reverse gear thrust washer (3)
28.4. Reverse gear (4)
28.5. Reverse gear bearings (5)
28.6. Reverse gear bushing (6)
28.7. Reverse gear synchronizer blocking ring (7)
28.8. 1st/reverse synchronizer assembly (8)
28.9. 1st gear synchronizer blocking ring (9)
28.10. 1st gear (10)
28.11. 1st gear bearings (11)
29. Remove the retaining ring for the 6th gear.
30. Remove the following from the countershaft (4):
30.1. Thrust washer (1)
30.2. 6th gear (2)
30.3. 6th gear bearing (3)
31. Remove the bolts for the shift interlock plate.
32. Let the shift interlock plate rest on the shift shafts.
33. Install the J 44730 (2) to the J 44707 (1).
Important: You will be using the intermediate case to pull off the 6th gear synchronizer hub and the 6th gear bushing. Ensure the J 44730 is properly located on the intermediate case.
34. Install the J 44730 (2) on the intermediate case as shown. The J 44730 needs to be aligned in order for the J 44707 to be centered on the mainshaft.
35. Using the J 44730 (2) and the J 44707 (1) on the countershaft, remove the 6th gear synchronizer hub and 6th gear bushing.
^ The intermediate case will slide off the 2nd/3rd shift shaft and the 4th/5th shift shaft.
^ Keep the shift shafts straight in order to ensure the intermediate case does not bind on the shift shafts.
^ If the intermediate case starts to bind on the shift shafts stop the pulling.
^ Re-straighten the shift shafts in the intermediate case and continue pulling.
36. Remove the 6th gear bearing race (1).
37. Remove the 6th gear synchronizer assembly (2).
38. Remove the intermediate case from the mainshaft and the countershaft.
39. Remove the 6th gear spacer from the countershaft.
40. Remove the 2nd/3rd shift fork and shaft, the 4th/5th shift fork and shaft, and the shift interlock plate from the main shaft assembly.
41. Remove the countershaft from the mainshaft by walking the countershaft away.