GMC 1976 ZEO 6083 Maintenance Manual page 501

Figure 72-Installing Support-to-Case Spacer
center support to case snap ring (one side
beveled) or the intermediate clutch backing
plate to case snap ring ( 093 " thick and both
sides flat).
5. Install previously selected rear unit selective
washer into slots provided inside rear of transmission
case . Retain washer with petrolatum, Figure 73 .
NOTE :
Proper washer size was determined at
time of rear unit end play check .
6. Laying gear unit on its side, install metal thrust
washer on output flange washer on output flange
with bent tabs in tab pockets. Retain thrust washer
with petrolatum, Figure 74 .
IMPORTANT:
This must be a metal thrust
washer.
CAUTION :
Be careful not to drop or bump
gear unit assemblyin transmission case dur-
ing installation .
7. Install gear unit, with center support and reac-
tion carrier, by lining up center support bolt hole
with hole in case and carefully guiding complete as-
sembly into transmission case, Figure 47 .
8. Lubricate center support to case snap ring with
transmission fluid and install snap ring in transmis-
sion case with beveled side up, (flat side against cen
ter support) locating gap adjacent to front band
anchor pin. Make certain ring is properly seated in
groove .
9. Install case to center support bolt .
TRANSMISSION 7- 5 3
REAR UNIT
SELECTIVE
THRUST WASHER
Figure 73-Removing and Installing Rear Unit
Selective Thrust Washer
NOTE :
To correctly perform this operation, it
will be necessary to make the tool shown in Fig-
ure 75 . Then follow procedure outlined below:
Place center support locating tool into the case
direct clutch passage, with the handle of the tool
pointing to the left, as viewed from the front of trans
mission and parallel to the bell housing mounting,
Figure 76.
Lift upward on the tool which will tend to rotate
the center support counterclockwise as viewed from
the front of transmission . While holding the center
support firmly counterclockwise against case splines,
torque case to center support bolt to 23 ft. lbs., using
a 3/8" 12-point thin-wall deep socket .
Figure 74-Installing Metal Thrust Washer