Disassembly

Major Components (3)
Disassembly





1. Remove seven bolts fixing the oil pump to the transmission case.
Remove the oil pump.





2. Remove race from oil pump.





3. Remove the overdrive planetary gear and overdrive direct clutch with thrust needle bearing from the transmission case.





4. Remove the race from OD planetary gear.





5. Remove the overdrive planetary ring gear from the transmission case.








6. Check piston stroke of overdrive brake
Place a dial indicator onto the overdrive brake piston as shown in the figure.
Measure the stroke applying and releasing the compressed air (390 - 780 kPa or 57 - 114 psi) as shown in the figure.
Piston stroke: 1.40 - 1.70 mm (0.0551 - 0.0669 inch)
If the values are nonstandard, select another flange.





Available flange sizes





7. Remove the snap ring.





8. Remove one flange, four plates and four discs (B-0).





9. Remove the thrust bearing and two races.





10. Using snap ring pliers, remove the snap ring.
11. Remove the OD support.





^ Remove two bolts fixing the overdrive support assembly to the transmission case.





^ Install two removed bolts to the OD support, and pull out the OD support assembly.














12. Remove the race from OD support.
13. Check piston stroke of second coast brake (B-1)
Place a mark on the second coast brake piston rod as shown in the figure.
Using feeler gauge, measure the stroke applying the compressed air (390 - 780 kPa or 57 - 114 psi) as shown in the figure.
Piston stroke: 1.5 - 3.0 mm (0.059 - 0.118 inch)
If the values are nonstandard, replace piston rod and recheck piston stroke.
If piston stroke is nonstandard, replace brake band.
There are two piston rods.





14. Using snap ring pliers, remove the snap ring.





15. Applying compressed air to the oil hole, remove the second coast brake piston assembly.





16. Remove the direct clutch and forward clutch from the transmission case.





17. Remove the E-ring from the pin.
Remove the pin from the brake band.





18. Remove the second coast brake band from the transmission case.





19. Remove the front planetary ring gear from the transmission case.





20. Remove the bearing and race.





21. Remove the race.





22. Using snap ring pliers, remove the snap ring.

NOTE: Hold the output shaft prevent it from falling. The output shaft falls when the snap ring is removed.





23. Remove the front planetary gear from the transmission case.





24. Remove sun gear input drum and one-way clutch.





25. Using two screwdrivers, remove the snap ring.





26. Remove, five discs and six plates (B-2).





27. Check pack clearance of first and reverse brake (B-3)
Using a feeler gauge, measure the clearance between the plate and second brake drum as shown in the figure.
Clearance: 0.6 - 1.12 mm (0.0236 - 0.0440 inch)
If the values are nonstandard, replace the discs.





28. Using snap ring pliers, remove the snap ring.





29. Remove the rear planetary gear, second brake drum and output shaft as an assembly.





30. Remove the assembled thrust bearing and race from the transmission case.