GMC 1989 Light Duty Truck, Repair Manual, Page: 732 / 998

7A1-36 700-R4 AUTOMATIC TRANSMISSION
6 3 2
6 2 2 6 2 9 631 /< 6 '4 5 6 4 6
6 0 0 SPRING A S M ., BOOST 3 -4 CLUTCH
6 1 9 RING, OIL SEAL (TURBINE SHAFT)
6 2 0 RETAINER & CHECK BALL ASSEMBLY
621 HOUSING & SHAFT ASSEMBLY, INPUT
6 2 2 SEAL, " 0 ” RING INPUT TO FORWARD HSG.
6 2 3 PISTON, 3RD & 4TH CLUTCH
6 2 4 SEAL, 3RD & 4TH CL. (INNER & OUTER)
6 2 5 RING, 3RD & 4TH CLUTCH APPLY
6 2 6 SPRING ASSEMBLY, 3RD & 4TH CLUTCH
6 2 8 HOUSING, FORWARD CLUTCH
6 2 9 SEAL, FORWARD CLUTCH (INNER & OUTER)
6 3 0 PISTON, FORWARD CLUTCH
631 SEAL, OVERRUN CLUTCH (INNER & OUTER)
6 3 2 PISTON, OVERRUN CLUTCH
6 3 4 SPRING ASSEMBLY, OVERRUN CLUTCH
6 3 5 SNAP RING, OVERRUN CLUTCH SPRING RETAINER
6 3 6 SEAL, INPUT HOUSING TO OUTPUT SHAFT
6 3 7 BEARING ASSEMBLY, INPUT SUN GEAR
6 3 8 S N A P R IN G , O V E R R U N C L . H U B R E T A I N I N G
6 3 9 H U B , O V E R R U N C L U T C H
6 4 1 R E T A I N E R & R A C E A S S E M B L Y , S P R A G
6 4 2 F O R W A R D S P R A G A S S E M B L Y
6 4 3 R E T A I N E R R I N G S , S P R A G A S S E M B L Y
6 4 4 R A C E , F O R W A R D C L U T C H ( O U T E R )
6 4 5 P L A T E A S S E M B L Y , O V E R R U N C L U T C H ( S T E E L & C O M P . )
6 4 6 P L A T E , F O R W A R D C L U T C H A P P L Y
6 4 8 P L A T E , F O R W A R D C L U T C H ( W A V E D )
6 4 9 P L A T E A S S E M B L Y , F O R W A R D C L U T C H
6 5 0 P L A T E , F O R W A R D C L U T C H B A C K I N G (SEL .)
6 5 1 RIN G , F O R W A R D C L U T C H B A C K I N G P L A T E R E T A I N E R
6 5 2 P L A T E , 3 R D & 4 T H C L U T C H R IN G R E T A I N E R
6 5 3 P L A T E , 3 R D & 4 T H C L . A P P L Y ( S T E P P E D )
6 5 4 P L A T E A S S E M B L Y , 3 R D & 4 T H C L U T C H
6 5 5 P L A T E , 3 R D & 4 T H C L U T C H B A C K I N G (S EL.)
6 5 6 RIN G , 3 R D & 4 T H C L U T C H B A C K I N G P L A T E R E T A I N E R
J H 0 1 2 9 7 0 0 R 4 R1
Figure 81 In p u t C lu tch A ss e m b ly
*
1.
2
.
3.
4.
surface on the hub and outer housing
leak at the weld
Assemble (Figures 82, 83, 85, 86 and 87)
TOOLS R E Q U IR E D :
J-23327-1 Clutch Spring Compressor
J-25018-A Clutch Spring Compressor
Adaptor
Inner and outer seals (608) on the piston
lips must face away from the hub as shown,
lubricate with transmission fluid.
Piston (607) into the housing and drum assembly
use an 8 mm feeler gage to position the lip
seals.
use care not to damage the seals.
Spring assembly (609)
large opening in the assembly goes towards
the piston.
Install J-23327-1 and J-25018-A.
compress the spring assembly
install the retainer ring (610).
5.
6
.
7.
Belleville steel clutch plate (611)
Clutch plates (612). (4 steel and 4 com position
plates required)
start with a steel and alternate with
com position
Backing plate (613)
chamfered side up
Retaining ring (614)
Measure (Figure 85, 86 and 87)
With the Reverse Input Clutch fully assembled,
apply an evenly distributed load to the Clutch
Pack in the direction shown in Figure 1. M edium
pressure (approximately 89 N or 20 lbs.) on the
Backing Plate applied by hand on five evenly
distributed points will obtain the Backing Plate
Travel for measurement.
CAUTION: (Excessive pressure w ill
distort the Belleville plate resulting in
an inaccurate measurement.)