Chevrolet 1977 10 Series, Repair Manual, Page: 243 / 468

AUTOMATIC TRANSMISSION (200)7A-7
J-7057. Position extension against end of output shaft and
set dial indicator to zero (Fig. 7A-27A).
d. Move output shaft upward by turning adjusting
screw on J-25013-5 until the white or scribed line on sleeve
J-25013 begins to disappear; then read end play. (Rear unit
end play should be 0.10-0.63mm.) (.004"-.025".)
NOTE:
Selective washer controlling this end play is
located between the front internal gear thrust washer
and output shaft snap ring. If more or less washer
thickness is required to bring end play within
specifications, select proper washer from the chart
shown in Fig. 7A-28A.
e. Remove dial indicator and clamp assembly (Fig. 7A-
27A). Do not remove J-25013 tools.
NOTE:
It may be necessary to tighten J-25013
adjusting screw on output shaft to remove snap ring.
3. Using snap ring pliers, remove output shaft to
selective washer snap ring (Fig. 7A-29A).
4. F ront Internal Gear:
a. Remove front internal gear, rear selective washer and
thrust washer.
b. Remove rear selective washer and thrust washer
from front internal gear.
5. Remove front carrier assembly and the front internal
gear to front carrier roller bearing assembly (Fig. 7A-30A).
NOTE:
Models CN, CU and CZ use a front carrier
with 2 pinions. All other models use 4 pinions.
REAR U N I T EN D P L A Y C H A R T
THIC KNES S
I D E N T I F I C A T I O N
Number and/or Color
2 . 9 0 - 3.01m m
(0.114' '-0 .1 1 9 ") 1 Orange
3 . 0 8 - 3.1 9m m (0.121' '-0 .1 2 6 ")
2 White
3 . 2 6 - 3 .3 7m m
(0.128 '-0.1 33” ) 3 Ye llo w
3 . 4 4 - 3 .5 5m m (0.135' '-0.140'')
4 Blue
3 . 6 2 - 3.73m m (0.143 ' -0 .1 4 7 ")
5 Red
3 . 8 0 - 3.91mm
(0.150' ' -0 .1 5 4 ") 6 Brown
3 . 9 8 -
4.09mm (0.157' '-0.161") 7 Green
4 . 1 6 -
4.27m m (0.164 '-0 .1 6 8 ") 8 Black
4 . 3 4 - 4.45mm (0.171' '-0 .1 7 5 ")
9 Purple
Fig. 7 A -2 8 A --R e a r U n it End Play W a s h e r Ch art
Fig. 7 A - 3 0 A ~ R e m o v in g Fro n t C a rrie r and Rolle r T h r u s t
Be a rin g
NOTE:
The front sun gear to front carrier thrust
bearing assembly may come out as the front carrier is
removed.
6. Remove front sun gear and front sun gear to front
carrier thrust bearing assembly (Fig. 7A-31A).
NOTE:
This thrust bearing requires only one thrust
race.
7. Input drum and rear sun gear assembly:
a. Remove input drum and rear sun gear (Fig. 7A-
32A).
b. Remove the 4 tanged input drum to reverse clutch
housing thrust washer from rear of input drum or from
reverse clutch housing.
8. Low and Reverse clutch housing assembly:
CAUTION: I f low and reverse clutch housing
assembly has to be removed, the low and reverse
clutch piston travel must be checked.
a. Using a No. 14 sheet metal screw, remove housing
to case cup plug and seal by turning screw 2 or 3 turns and
pulling straight out. D iscard cup plug and seal (Fig. 7A-
33A).
NOTE:
If cup plug will not remove, grind
approximately 20mm (3 /4 ") from end of 6.3mm (No.
4) easy out to remove cup plug. Then use No. 14 sheet
metal screw to remove seal.
F R O N T C A R R I E R
R O L L E R T H R U S T
A R I N G ASSY.
REAR SELECTIVE
WASHER &
ID ENTIF ICATION
THRUST
WASHER
■FRONT
^INTERNAL
GEAR
• X 2
F R O N T SUN G E A R
mt
#
tM
T H R U S T B E A R IN G ASSY.
Fig. 7 A - 2 9 A ~ R e m o v in g O u t p u t S h a ft t o Se le ct ive W a s h e r
Sn a p Ring
Fig. 7A-3 1 A -Removing Thrust Bearing Assembly and Front
Sun Gear