GMC T Series 1994 Repair Manual page 807

1
. LEVER, GEAR SHIFT STUB
2
. CAR MASTER CONTROL HOUSING
3. SEAT, CONTROL LEVER SPRING
4. SPRING, CONTROL LEVER
5. PLUG, CUP EXPANSION INTERLOCK
6
. BOLT. COVER TO CASE
7. -PIN, COVER
8
. COVER, SHIFT LEVER
9. PIN, SHIFT ROD INTERLOCK
10
. PIN, SHIFT ROD INTERLOCK
11
. FORK, THIRD AND FOURTH SHIFT
12
. PAD, SHIFT FORK
13.
PLUNGER, SHIFT INTERLOCK
14. RAIL, FIRST AND SECOND SHIFT
15. RAIL, THIRD AND FOURTH SHIFT
16. FORK, FIRST AND SECOND SHIFT
18. RETAINER, REAR OIL
19. SPACER, SPEEDOMETER
20
. RING, REAR BEARING RETAINER
21. RING, REAR BEARING RETAINER
22
. SEAL, EXTENSION OIL
23. RETAINER, REAR OIL
24. SEAL, EXTENSION OIL
25. DAMPER, VIBRATION
26. YOKE, PROPELLER SHAFT
27. WASHER, MAINSHAFT NUT
28. NUT, MAINSHAFT
29. RETAINER, REAR OIL
Figure 2—Transmission Shift Mechanism and Case Components - Legend
15. Overdrive gear assembly.
•S lid e overdrive fork (137) as far rearward as
possible w hile w orking the overdrive gear
assembly rearward.
• If unable to remove overdrive gear assembly,
remove overdrive clutch gear (134), synchroniz­
er ring (133), spacer (126), and overdrive gear
bearings (125) to lower and remove overdrive
gear (129).
• Do not let the synchronizer come apart.
16. Countershaft thrust washer (124) and pin (101).
17. Bearing retaining plate bolts (128).
18. Mainshaft bearing retainer plate (140), shim(s)
(141), and mainshaft rear bearing cup (142).
• Move synchronizer sleeves into neutral position.
• Raise overdrive shift lever up out of the way
and hold with a rubber band.
19. Mainshaft assembly.
• Lift the mainshaft assembly by the nose through
the front. It may be necessary to wiggle and
twist the mainshaft assembly to remove the
second speed gear from the countershaft.
30. DAMPER, VIBRATION
31. WASHER, MAINSHAFT NUT
32. NUT, MAINSHAFT
33. BOLT, RETAINER
34. PIN, RETAINER DOWEL BUSHING
35. SPRING, SHIFT FINGER PLUNGER
36. PLUNGER, FIRST AND SECOND BIAS SHIFT
37. PIN, SPRING TYPE
38. LUG, FIRST AND SECOND SHIFT
39. LUG, OVERDRIVE
40. LUG, THIRD AND FOURTH SHIFT
41. PLUNGER, THIRD AND FOURTH BIAS SHIFT
42. BO LT, REVERSE INHIBITOR CAM
43. INHIBITOR, REVERSE
44. PIN, REVERSE INHIBITOR CAM
45. FORK, REVERSE AND OVERDIRVE
46. RAIL, OVERDRIVE AND REVERSE
47. PLUNGER, SHIFT FORK AND BAR POPPET
48. SPRING, SHIFT ROD POPPET BALL
49. PLUG, SHIFT BAR HOUSING EXPANSION
50. GASKET, BACK UP LAMP SWITCH
51. SWITCH, BACK UP LAMP
52. PIPE, VENT
53. NUT, JAM
54. SENSOR, SPEED
55. BO LT, SPEED SENSOR
56. TRUNION, TRANSMISSION
20. Bearing retaining plate bolts (128).
21. Countershaft bearing retainer plate (127) and
shim(s) (123).
22. Countershaft rear bearing cup (122).
23. Reverse idler gear shaft (112).
24. Reverse idler gear (110), washers (108), bearings
(109), and spacer (111).
25. Countershaft rear bearing (100) (figure 7).
• Make sure the bearing puller is attached to the
bearing inner race.
26. Countershaft assembly (102).
27. Countershaft bearing cap (117).
28. Countershaft front bearing cup (118).
29. Overdrive shift lever retaining pin.
30. Overdrive shift lever shaft (139).
• Push shaft outward from inside of case.
31. Overdrive shift lever.
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