Chevrolet 1977 10 Series, Repair Manual, Page: 310 / 468

(350)7A-26 OVERHAUL MANUAL
F O R W A R D C LU TC H
BALL C H E C K
EX H A U S T
F O R W A R D C LU TC H D R U M
Fig. 7 A - 8 6 B - - F o r w a r d C lu tch Exhuast Ch eck Ball
Inspection
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 exhaust check ball (fig. 7A-
86B).
Fig. 7A-87B--lnstalling Forward Clutch Piston
Fig. 7 A -
8 8
B--D e te rm in in g S e le ctiv e Fit f o r F o r w a r d Clu tc h
Pressure Plate
5. Inspect input 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 pistons assembly with the
aid of a feeler gauge or a piece of .020" piano wire crimped
into copper tubing (fig. 7A-87B).
3. Install twenty-one (21) clutch return coil springs.
4. Install spring retainer. Compress spring retainer and
install retaining ring using tool J-23327-1 as shown on Figure
7A-84B.
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. Install forw ard clutch pressure plate (selective fit) and
retaining ring. Using chart on Figure 7A-88B to select correct
pressure plate (dimension C), m easure 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 end of the drum (dimension
B). Subtract B from A to get dimension C.
SUN GEAR AND SUN GEAR DRIVE SHELL
(FIG.7A-89B)
Disassembly
1. Remove sun gear to sun gear drive shell rear retaining
ring (fig. 7A-90B).
W HEN DIM. C IS
USE
(OR EQUIVALENT)
6261072
6261349
.0160— . 0520
. 0 5 2 0 — . 0 8 3 0
. 0830— .1218
62 6 1 3 5 0
F O R W A R D CLUTCH H O U S I N G
.020" PIANO WIRE CRIMPED
IN TO COPPER TUBING
PISTON