Disassembly
1. Drain A.T.F.2. Remove torque converter.
3. Remove oil pump shaft and input shaft.
4. Remove snap retainer, governor cap with breather hose and O-ring.
5. Remove oil pan guard and oil pan and inspect its contents. An analysis of any foreign matter can indicate the types of problems to look for. If the fluid is very dark, smells burned, or contains foreign particles, the frictional material (clutches, band) may need replacement. A tacky film that will not wipe clean indicates varnish build up which can cause valves, servo, and clutches to stick and may inhibit pump pressure.
6. Remove control valve body.
Remove manual valve from valve body as a precaution, to prevent valve from dropping out accidentally.
7. Remove manual shaft securing nuts.
8. Pull out retaining pin, then remove throttle lever, manual plate, manual shaft, selector range lever and parking rod assembly.
9. Disconnect throttle wire from throttle lever, then remove throttle wire. Remove parking actuator support from transmission case.
10. Loosen band brake piston stem lock nut, then back off piston stem.
11. Remove accumulator piston with compressed air.
Be careful that accumulator piston does not jump out.
12. Remove converter housing securing bolts.
13. Separate converter housing from transmission case by tapping it.
Be careful not to drop final drive assembly.
14. Remove final drive assembly.
15. Straighten lock washer.
16. Remove idler gear bolt and lock washer.
17. Remove front cover retaining bolts.
18. Tap output shaft, then remove it together with front cover.
a. When tapping output shaft, be sure to hold front cover so that it does not fall.
b. Adjusting shim is attached to rear internal gear side of output shaft so be careful not to lose it.
19. Remove front cover gasket.
20. Remove idler gear, idler gear shaft and taper roller bearings by tapping idler gear shaft.
21. Remove seal bushing.
22. Remove governor shaft retaining bolt.
23. Pull out governor shaft.
24. Remove the following parts.
To prevent brake linings from cracking or peeling, do not stretch the flexible band unnecessarily. Before removing the brake band, always secure it with a clip as shown in the figure at left. Leave the clip in position after removing the brake band.
25. Pull out parking paw shaft, then remove parking paw and return spring.
26. Remove low and reverse brake retainer.
27. Remove low and reverse brake piston with compressed air.
Be sure to hold low and reverse brake piston with nylon cloth so that they do not jump out.
28. Remove oil pump assembly, thrust washer and thrust needle bearing.
The oil pump and transmission case fit loosely, but the clearance is very small. So always lift it straight out of transmission case.
29. Remove inhibitor switch.
30. Remove band servo piston and return spring.
31. Remove band brake servo, retainer and return spring.