Chevrolet 1973 Overhaul Manual page 321

7 A -1 8 A U T O M A T IC T R A N S M IS S IO N
NOTE: This is a precision bushing and if
dam aged or worn excessively must be
replaced.
4. Check shifter shaft seal. If it shows signs of damage
or leaking, pry it out and install a new seal. The
new seal must be firmly seated in case counterbore.
Repairs
Rear B ush in g-R ep lacem en t
Transmission case rear bushing is a precision bushing
which requires no reaming or finishing after assembly.
1. Remove bushing by driving or pressing from within
case using J-9557 and Handle J-7079.
2. To install new bushing, drive or press bushing into
place from rear of case using Tool J-9557 and
Handle J-7079 (fig. 28PG).
Install bushing only until shoulder
CAUTION:
o f J-9557 contacts the rear face o f the case.
Excessive force, either hammering or pressing
may crack or otherwise damage the aluminum
case.
Transmission Extension
Inspection
1. Wash extension thoroughly with cleaning solvent
and air dry.
Do not use rags to dry parts.
CAUTION:
2. Inspect extension for cracks that may contribute to
leakage.
3. Inspect extension rear bushing for damage or
excessive wear.
Fig. 2 8 P G -In sta llin g Case Rear Bushing
4. Inspect rear oil seal and replace if damaged or
worn.
Repairs
Rear B u sh in g -R ep lacem en t
For service, the transmission extension rear bushing is of
a precision type which requires no reaming or finishing
after installation.
1. Place transmission extension in air arbor press rear
end up.
2. Using J-5778, press old bushing from extension.
3. Place new bushing on pilot end of J-5778 and press
it into place.
4. Replace extension rear oil seal, using Seal Installer
J-5154. Prelubricate between lips of seal with cup
grease.
TRANSM ISSIO N-ASSEM BLY
NOTE: Use only transmission oil or petro­
leum jelly as lubricants to retain bearings or
races during assembly. Lubricate all bearings,
seal rings and clutch plates prior to assembly.
If removed, assemble manual linkage to case as
described in Steps 1 through 7.
1. Install the parking lock pawl and shaft and insert a
new "E " ring retainer.
2. Install the parking lock pawl pull-back spring over
its boss to the rear of the pawl. The short leg of the
spring should locate in the hole in the parking pawl.
3. Install the parking lock pawl reaction bracket with
its two bolts.
4. Fit the actuator assembly between the parking lock
pawl and the bracket.
5. Insert the outer shift lever into the case, being
careful of the shaft seal, and pick up the inner shift
lever and parking lock assembly and tighten alien
head screw. Lubricate the shaft and seal with oil.
6. Insert outer TV lever and shaft, special washer and
"O " ring into case and pick up inner TV lever.
Tighten alien head nut.
NOTE: To prevent possible binding between
throttle and range selector controls; .010 to
.020" clearance must exist between inner TV
lever and inner shift lever after assembly.
7. Thread the low band adjusting screw into case.
NOTE: The above internal components are
shown in their proper relationship in Figure
15PG.
Transmission Internal Components
8. Install the inner and outer seals on the reverse
piston and, lubricating the piston and case with
transmission oil, install the piston into the case (fig.
29PG). If necessary, carefully slide a feeler gauge
O VERHAUL MANUAL