Chevrolet 1980 Light Duty Truck Repair Manual page 295

F i g . 7 A - 2 7 C - - R e m o v i n g R e a r O i l S e a l f r o m C a s e E x t e n s i o n
Removal of Rear Oil Seal and Case Extension
and Front Unit End Play Check
1. If necessary to replace, pry rear oil seal from case
extension (Fig. 7A -27C ).
2. R em ove case extension to case attaching bolts.
3. R em ove case extension to case gasket (Fig. 7A -28C ).
4. M ake front unit end play check as follow s (Fig. 7A -
29C):
a. R em ove one front pum p attaching bolt, and bolt
washer. (See Fig. 7A -29C for location).
b. Install a 3 /8" -16 threaded slide ham m er bolt or J-
9539, into bolt hole.
c. M ount a dial indicator on rod and index indicator
to register w ith end o f turbine shaft.
GASKET
Fig. 7A-28C--Case Extension and Gasket
A U T O M A T IC T R A N S M IS S IO N S
DIAL
I N D I C A T O R
J-8001
Fi g . 7 A - 2 9 C - - C h e c k i n g F r o n t U n i t E n d P l a y
d. Push on turbine shaft rearward.
e. Push output shaft forward.
f. Set dial indicator to Zero.
g. Pull turbine shaft forward.
Read resulting travel
.003 "-.024".
Selective washer controlling this end play is the washer
located between pum p cover and forward clutch housing.
If m ore or less washer thickness is required to bring end play
w ithin specifications, select proper washer from the chart
show n in Fig. 7A -30C . A n oil soaked w asher m ay tend to
discolor, so it w ill be necessary to m easure w asher for its
actual thickness.
FRONT END WASHER THICKNESS
Thickness Number
.060 - .064
- 0 -
.071 - .075
- 1 -
.082 - .086
- 2 -
.093 - .097
- 3 -
.104 - .108 - 4 -
.115 - .119
- 5 -
.126 - .130
- 6 -
Fig. 7A-30C--Front End W asher Selection Chart
(4 0 0 )7 A-9
or end play. Should be
Color
Y ellow
Blue
Red
Brown
Green
Black
Purple
OVERHAUL MANUAL