GMC T Series 1994 Repair Manual page 907

INTERNAL COMPONENTS
[*--► 1 Remove or Disconnect (Figures 3 through 23)
Tools Required:
J 22912-01 Gear Puller
J 8433-4 Puller
J 8092 Driver Handle
J 29169 Bearing Remover/Installer
J 33832 Bearing Remover/Installer
J 2619-01 Slide Hammer
J 29369-1 Output Shaft Bearing Remover
1. Speedometer tone wheel (1) from the mainshaft
(23) using J 22912-01 and J 8433-4 (figure 5).
• Be careful not to install J 22912-01 under the
tone wheel snap ring (3).
2. Tone wheel snap ring (3) from the mainshaft (23).
3. Rear output bearing snap ring (4) from the main­
shaft (23) using snap ring pliers (figure 6).
4. Case screws (62) from the case halves. Note these
are self-tapping screws and aluminum shavings are
common upon removal.
5. Rear case half (46) from the front case half (31).
• Using a suitable tool, pry between the two pry
bosses to separate the case halves.
6. Clutch coil wire connector (5) from the clutch coil
wire (figure 6).
7. Clutch coil nuts (6) from the clutch coil assembly
(7) (figure 7).
8. Clutch coil (7) from the rear case half (46).
9. Shift rail spring (8) from the shift rail (9).
10. Clutch coil housing snap ring (10) and the clutch
coil housing (11) from the mainshaft (2) using snap
ring pliers (figure 8).
11. S ynchronizer hub (55) from the synchronizer
assembly (12).
12. Synchronizer assembly (12) from the mainshaft
drive gear and mode shift fork (13) from the shift
rail (9) (figure 9).
13. Front output shaft snap ring (15) and flat washer
(17) from the front output shaft (16) (figure 10).
14. Drive gear (18), driven gear (19), and drive chain
(20) as an assembly (figure 11).
15. Front output shaft (16) from the front output bearing
22
( ).
16. Oil pump assembly (66) and mainshaft (23) from
the input carrier (25) and front case half (31) (figure
12
).
17. Shift rail (9), range fork (28), and shift hub (29)
from the input carrier assembly (25) (figure 13).
18. Annulus gear snap ring (30) from the front case
(31) (figure 14).
19. Annulus gear (32) from the front case (31) (figure
15).
20. Input shaft front oil seal (33) from the front case
(31).
21. Carrier assembly snap ring (34) from the carrier
assembly input shaft (25) (figure 16).
22. Input carrier assembly (25) and power take off
drive gear (35) from the front case (31) (figure 17).
23. Retaining clip (36) from the sector shaft (37) (figure
18).
24. Sector shaft (37) from the front case (31).
25. Sector (38), detent spring (39), and detent roller
(49) from the front case (31).
26. Front input bearing snap ring (43) from the front
case (31) (figure 19).
27. Front input bearing (44) from the front case (31)
using J 8092 and J 29169 (figure 20).
28. Rear output bearing (45) from the rear case half
(46) using J 8092 and J 33832.
29. Front output shaft rear bearing (85) from the rear
case (46) using J 2619-01 Slide Hammer and
J 29369-1 Output Shaft Bearing Remover (figure
21
).
30. Front output shaft seal (42) from the front case
(31).
31. Front output bearing snap ring (40) from the front
case (31) (figure 22).
32. Front output bearing (22) from the front case (31)
using J 8092 and J 33832 (figure 23).
33. Rear output shaft seal (47) from the rear bearing
retainer (50).
SYNCHRONIZER HUB
ASSEMBLY
Disassemble (Figure 24)
❖
1. Synchronizer hub snap ring (51) from the synchro­
nizer hub assembly (12).
2. Lockup hub (52) and compression spring (53) from
the lockup collar (54).
OIL PUMP ASSEMBLY
❖ Disassemble (Figure 24)
• Mainshaft from oil pump assembly.
1. Oil pump cover screws (64) and oil pump cover
(70) from the oil pump body (66).
2. Oil pump drive gear (67) and driven gear (68) from
oil pump body (66).
3. Retainer (71) from the pick up tube (72).
4. Pick up tube (72) and oil pump pickup (26) from
the oil pump body (66).
5. Oil pump pickup (26) from the pick up tube (72).
6. Needle bearings from (19) mainshaft.