GMC T Series 1994 Repair Manual page 725

4. Piston (606) for:
• Cracks.
5. Seals (603, 604 and 605) for:
• Cuts.
• Tears.
• Nicks.
6. Forward clutch housing (602) for:
• Wear.
• Open lubrication holes.
• Damaged thrust faces.
• Free operation of checkball.
Assemble
Figures 50,51 and 52
1. Lubricate new inner seal (605) and outer seal
(604) with DEXRON®-IIE transmission fluid.
Lubricate seal grooves with TRANSJEL™
J 36850 or equivalent.
2. Seals (604) and (605) on piston (606) with lips
facing down towards housing.
3. Lubricate center housing seal (603) and groove.
4. Center housing seal (603) onto forward clutch
housing (602) with lip facing up.
5. J 21362 over clutch hub.
6. Piston (606) inside J 38732 and insert assembly
into housing (602) rotating slightly until seated.
7. Retainer and spring assembly (607) with J 23327.
8. Snap ring (608).
[51 Assemble
51
Fig u re
1. Dished clutch plate (609). Inside dish down.
2. Steel plates (610) .0775" thickness and plate
assemblies (611). Starting with steel plate first.
3. Direct clutch hub (615) in forward clutch housing
(602).
4. Snap ring (616).
5. Install forward clutch assembly onto turbine shaft
(502).
[ q I Measure
53,54 55
Fig u res a n d
• Measure piston travel with J 8001 dial indicator
set by applying air to forward clutch passage.
• Piston travel is 3.07-4.72 mm (0.121-0.186 inch).
(Figure 54)
• Remove J 8001, snap ring (616) and hub (615).
NOTICE:
If excessive leakage from turbine shaft
(502) or seals (503) then use reconditioned shaft.
151 Assemble
51,53 54
Fig u res a n d
1. Bronze thrust washer (612) on inside of hub
(613). Retain with TRANSJEL™ J 36850 or
equivalent.
2 Thrust washer (614) on outside of forward clutch
hub (613).
3. Forward clutch hub (613) in clutch housing (602).
[ T ] Important
• Dip clutch p lates in DEXRON®-IIE
transmission fluid.
4. Direct clutch hub (615) in forward clutch housing
(602).
5. Snap ring (616).