Pontiac tempest 1968 Service Manual page 518

T W O SPEED A U T O M A T I C TRANSMISSION
7F-17
L O W S U N G E A R
A N D F L A N G E
A S S Y .
F O R W A R D
C L U T C H D R U M
F i g . 7 F - 4 4 Removing Low Sun G e a r and Flange Assembly
CASE BUSHING R E P L A C E M E N T
1. Remove bushing, using bushing chisel J 8400-1,
Avoid damaging bushing bore.
2. Install new bushing, using installer J 21424-2
and handle J 8 0 9 2 .
REVERSE CLUTCH AND PISTON
DISASSEMBLY AND INSPECTION
1. Remove and discard reverse piston inner and
outer seals.
2. Check for broken piston return springs and
make a comparative check of spring heights by
standing all springs in a row
e
If there is appreci­
able difference in spring height, replace springs.
3. Examine clutch plates for evidence of wear or
burning. Discard damaged plates. L - 6 clutch pack
contains 4 steel and 4 faced plates, V-8 contains 5
steel and 5 faced plates.
4. Check piston for cracks or distortion.
ASSEMBLY
1
0
Check reverse piston thickness. L - 6 piston is
1" thick; V-8 piston is 13/16" thick.
2. Lubricate with transmission oil and install
inner and outer seals in reverse piston grooves,,
FORWARD CLUTCH
RANGE S E L E C T O R SHAFT OIL S E A L
R E P L A C E M E N T
1. Pry out old seal.
2. Tap new seal gently until it bottoms in case
bore. Use a piece of flat metal or wood to avoid
damaging seal.
PARK LOCK ACTUATOR ASSEMBLY AND INNER
PARK LOCK AND RANGE SELECTOR LEVER
DISASSEMBLY
Remove retainer ring that holds inner park lock
and range selector to park lock actuator assembly
(Fig. 7F-42).
DISASSEMBLY
1. Remove low sun gear and flange assembly snap
ring (Fig. 7F-43),
2. Remove low sun gear and flange assembly (Fig.
7F-44).
3. Remove clutch hub rear thrust washer (Fig.
7F-45).
4. Remove clutch hub (Fig. 7F-46).
5. Remove clutch hub front thrust washer (Fig.
7F-47).
6. Remove clutch pack.
7. Using spring compressor J 9542, compress
piston return springs (Fig. 7F-48). Remove snap
ring.
INSPECTION
Check for worn or damaged parts and replace as
required.
ASSEMBLY
Engage park lock actuator assembly in inner park
lock and range selector lever and secure with re­
tainer ring (Fig„ 7F-42).
8. Carefully release pressure, then remove spring
retainer and return springs.
9. Remove clutch piston with twisting motion. Re­
move and discard outer seal on piston and inner seal
on clutch drum hub.
INSPECTION
1. Wash all parts in cleaning solvent and air dry.