GMC T Series 1994 Repair Manual page 650

621 HOUSING AND SHAFT ASSEMBLY, INPUT
622 SEAL, O-RING INPUT TO FORWARD HSG.
623 PISTON, 3RD AND 4TH CLUTCH
625 RING, 3RD AND 4TH CLUTCH (APPLY)
626 SPRING ASSEMBLY, 3RD AND 4TH CLUTCH
628 HOUSING, FORWARD CLUTCH
629 SEAL, FORWARD CLUTCH (INNER AND OUTER)
630 PISTON, FORWARD CLUTCH
Figure 59 Forward Clutch and 3-4 A pply Ring -
Installed
2. Inner and outer seals (629) on forward clutch
piston.
• Seal lips must face away from the piston
tangs as shown.
• L ubricate w ith Transjel™ J 36850 or
equivalent.
3. Forward clutch piston (630) into the forward
clutch housing.
• Use care not to damage the outer lip seal.
4. The 3-4 clutch spring assembly (626) onto the
3-4 clutch apply ring.
5. Forward clutch assembly onto the 3-4 clutch
spring assembly.
• The forward clutch piston apply legs must
be indexed with the 3-4 clutch apply ring
legs.
6. J 29883 on the input housing as shown.
J 29883
RH0155-4L60-E
621 HOUSING AND SHAFT ASSEMBLY, INPUT
623 PISTON, 3RD AND 4TH CLUTCH
625 RING, 3RD AND 4TH CLUTCH (APPLY)
626 SPRING ASSEMBLY, 3RD AND 4TH CLUTCH
628 HOUSING, FORWARD CLUTCH
630 PISTON, FORWARD CLUTCH
631 SEAL, OVERRUN CLUTCH (INNER AND OUTER)
632 PISTON, OVERRUN CLUTCH
Figure 60 Overrun Piston - Installed
7. Apply ring and forward clutch assembly into
the input housing as shown.
A. Hold the assembly by the apply ring legs
during installation.
B. Do not let the forw ard clutch piston
separate from the housing.
C. Firmly seat the assembly.
8. J 29882 on the input housing as shown.
9. Overrun clutch piston (632).
• Hub facing upward as shown.
• If all parts are properly seated to this point,
the o v erru n
approximately 4.7 mm (3/16 in.) below the
top of the snap ring groove in the input
housing hub.
631
RH0156-4L60-E
p isto n hub w ill be