Selecting Proper Band Apply Pin; Checking For Proper Band Apply Pin - Pontiac Grand Prix Service Manual

TURBO HYDRA-MATIC TRANSMISSION M-38
7G-45
Fig. 7G-116 Checking Front Unit End Play
must be corrected before pump is pulled into place.
3 1. Check front unit end play as follows (Fig. 7G- 1 16):
a. Move transmission so ,that output shaft points down
andinstall a 5/16"-18 threaded slide hammer bolt (or J
21904-1) into threaded bolt hole in pump body (at 4
o'clock position).
b. With flat of hand, move input shaft rearward and
mount Dial Indicator J 8001 on bolt and index plunger
ofindicator on end of input shaft. 'Zero' the indicator.
c. Push up on output shaft and record the amount of
end play registered by the dial indicator.
d. Indicator should read from .033" to .064". If reading
is within these limits, proper selective thrust washer is
being used.
NOTE: Front unit end plav is controlled by thickness of
pump cover-to-direct clutch drum selective thrust washer.
This is the washer having one (I) tang (Fig. 7G-li 7).
e. If reading is not within these limits, it is necessary to
remove pump, change to a thicker or thinner selective
thrust washer as required to obtain specified clearance,
re-install pump and repeat the above checking proce-
dure.
NOTE: There are three (3) selective washers available,
.065-.067, .082-.084 and .099-.I 01.
32. When end play is within specifications, remove
tools, install remaining pump attaching bolt with its
new washer-type seal and torque bolt to 20 Ib. ft.
IMPORTANT: Make sure input shaft can be rotated.
It it cannot, this condition must be corrected
SELECTING PROPER BAND APPLY PIN
1. Check for proper band apply pin selection in the
following manner.
a. Using Band Apply Pin Gage J 23071 and a
straightedge, apply firm downward pressure on the
gage as shown in Fig. 7G-Pl8.
NOTE: There are two (2) selective apply pins available
for service. A longer pin is
2
31/'32" in length and is
identified by a groove located on the band lug end of the
pin; whereas, the short pin is 2 27/32" in length and
carries no identification.
b. If Gage J 2307 1 is below the straightedge surface,
the long pin should be used.
c. If Gage J 23071 is above the straightedge surface,
the short pin should be used.
Fig.
7G-117
Front Unit End Play Selective Thrust
Washer
Fig.
7G-118
Checking for Proper Band Apply Pin