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7A2-32
1977 PONTIAC SERVICE MANUAL
JST
Fig.
7A2-68
Pump Body Oil Passages
Fig.
7A2-69
Pump Cover Oil Passages
2. Install new direct clutch oiston center seal on drum
with lip facing upward.
3. Install direct clutch piston into housing with aid of
a feeler gage or a piece of .020" piano wire crimped into
copper tubing (Fig. 7A2-76).
4. Install seventeen (17) clutch return coil springs.
5. Install piston return spring seat and retaining ring.
Compress spring seat with Tool J 23327 and engage retaining
ring (Fig. 7A2-73).
6. Lubricate with transmission fluid and install face
plates and steel separator plates, alternating steel and faced
plates.
7. Install direct clutch pressure plate and retaining ring.
FORWARD CLUTCH (FIG. 7A2-77)
Disassembly
1. Remove direct clutch drum to forward clutch housing
needle roller bearing (Fig. 7A2-78).
2. Remove forward clutch retaining ring and pressure
plate (Fig. 7A2-79).
3. Remove four face plates, four steel separator plates
and cushion spring (Fig. 7A2-80).
4. Using Tool J 23327-1, compress retainer and remove
forward clutch drum to piston return seat retaining ring (Fig.
7A2-8 1).
5. Remove piston return seat and twenty-one (21) clutch
return coil springs.
6. Remove forward clutch piston assembly.
7. Remove the forward clutch inner and outer piston
seals (Fig. 7A2-82).
I nspection
1.
Inspect drive and driven clutch plates for signs of
burning, scoring or wear.
2. Inspect twenty one (21) springs for collapsed coils or
signs of distortion.
3. Inspect piston for cracks.
4. Inspect clutch housing for wear, scoring, open oil
passages and free operation of ball check exhaust (Fig. 7A2-
83).
5. Inspect output shaft:
a. Inspect for open lubrication passages at each end.
b. Inspect splines for damage.
c. Inspect ground bushing journals for damage.
d. Inspect shaft for cracks or distortion.
NOTE: Input shaft and clutch housing are serviced
separately.
Reassembly
1. Install new forward clutch inner piston seal and outer
piston seal.
2. Install the forward clutch piston assembly (with the
aid of a feeler gage or piece of .02OW piano wire crimped into
copper tubing (Fig. 7A2-84).
3. Install twenty-one (21) clutch return coil springs.
4. Install piston return seat. Compress return seat and
install retaining ring, using Tool J 23327 as shown on Fig.
7A2-8 1.
5. Lubricate with transmission fluid and install cushion
spring, face plates and steel separator plates, starting with the
cushion spring and alternating steel and faced.
6. Using chart on Fig. 7A2-86 to select correct pressure
plate (dimension C) to be used on assembly, measure distance
from the top of clutch pack to the top of clutch drum
(dimension A). Measure distance from the lower edge of the
notch on the inner surface of the drum to the top of the drum
(dimension B). Subtract B from A to get dimension C. Install
selected pressure plate (indicated by dimension C) and
retaining ring into forward clutch drum.
SUN GEAR AND SUN GEAR DRIVE
SHELL (FIG. 7A2-86)
Disassembly
1. Remove sun gear to sun gear drive shell rear retaining
ring (Fig. 7A2-87). Discard retaining ring.
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