Chevrolet 1973 Overhaul Manual page 323

7 A -2 0 A U T O M A T IC T R A N S M IS S IO N
18. Remove the rubber seal ring from the oil pump
body and, using guide studs from J-3387 set, install
clutch drum selective thrust washer, oil pump gasket
and oil pump to case. Install two pump-to- case
bolts.
19. To check for correct thickness of the selective fit
thrust washer, move transmission so that ouput
shaft points down and proceed as follows:
a. Mount a dial indicator so that plunger of
indicator is resting on end of the input shaft.
J-5492 may be used to support the dial indicator
as shown in Figure 32PG. Zero the indicator.
b. Push up on the transmission output shaft and
observe the total indicator movement.
c. The indicator should read .028" to .059". If the
reading is within limits, the proper selective fit
washer is being used. If the reading is not within
limits, it will be necessary to remove the front
pump, change to a thicker or thinner selective fit
thrust washer, as required to obtain the specified
clearance, and repeat the above checking
procedure.
NOTE: Clutch drum selective thrust washers
are available in thicknesses of .061", .078",
.092" and .106".
20. Install the servo piston, piston ring, and spring into
the servo bore. Then, using a new gasket and "O "
ring, install the servo cover. See that gasket is
properly aligned with the three bolt holes and the
drain back passage in the case.
21. Remove the oil pump and the selective fit washer
from the case, and install the low brake band,
anchor and apply struts into the case. Tighten the
low band adjusting screw enough to prevent struts
from falling out of case.
22. Place the seal ring in the groove around the oil
Fig. 32PG~Checking End Play for Proper Thrust
W asher Selection
pump body and the two seal rings on the pump
cover extension. Install clutch drum selective thrust
washer, oil pump gasket and oil pump to case.
Remove guide pins and install all pump bolts,
replacing any dam aged bolt sealing washers
necessary and torque bolts to specification.
Extension, Governor and Governor Support
23. Turn transmission so that shaft points upward.
24. Install governor support and gasket, drain back
baffle, and support to case attaching bolts. Bolt
holes are positioned so that the support may be
assembled only in the proper position.
25. Install governor over output shaft (See "Governor-
-Assembly" for body to hub installation.) Install
governor shaft and valve, urethane washer, and
retaining "C " clips. Center shaft in output shaft
bore and tighten governor hub drive screw.
26. Using Tool J-5814, install speedometer gear into
output shaft.
27. Place extension seal ring over governor support and
install transmission extension and five retaining
bolts.
28. If removed, replace speedometer driven gear.
Oil Pan and Valve Body
29 With transmission upside down, and manual linkage
installed as previously described, and the selector
lever detent roller installed, install the valve body
(servo apply tube installed) and a new gasket.
Carefully guide the servo apply line into its boss in
the case as the valve body is set into place (fig.
33PG). Install six mounting bolts and range selector
detent roller spring shown in Figure 1 IPG.
NOTE: Position the manual valve actuating
lever fully forward when installing valve
body to more easily pick up the manual
valve.
Fig. 3 3 PG--Installing Valve Body
OVERHAUL MANUAL