GMC 1982 Light Duty Truck, Service Manual

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A U T O M A T IC T R A N S M IS S IO N 700-R 4-11
4. Remove the manual shaft and nut.
5. If necessary remove the inside detent lever from the actuator
rod assembly by rotating the rod and indexing notches in the
rod with the hole in the lever.
6. Inspect the manual shaft seal in the case for damage, and
proper location and if necessary replace as follows:
a. Using a small screwdriver remove by driving outwards.
b. Install a new seal by locating a socket on the outside
of the new seal and drive inwards. Make sure the seal
is bottomed square against bottom of the case bore and
with the open or sealing surface facing inboard. (Fig.
12 )
Figure 700-R4-12 Manual Shaft Seal Location
Inspection
1. Inspect the actuator rod assembly for damage, correctness of
shape (not bent).
2. Inspect the actuator rod spring for freeness of action,
distortion.
3. Inspect the inside detent lever for damage or cracks.
4. Inspect the manual shaft for damage and burrs.
Assembly
(Fig. 13)
1. If removed, connect the parking lock actuator assembly to
the inside detent lever by indexing the notches on the actuator
rod with the slot on lever.
2. Install the outer manual shaft part way into the case with the
long pin end first.
3. On the outer manual shaft loosely install the manual shaft
retainer the inside detent lever with the small ear inboard and
the attached actuator rod assembly. Position the end of the
actuator rod on the outside side of the parking lock pawl and
on the inside of the bracket.
4. Install the manual shaft retaining nut on the manual shaft,
do not engage threads.
5. Gently tap the outer manual shaft into the case.
6. Indexing the slot in the outside detent lever and the manual
the shaft engaging threads and torque to 31 N*m (23 ft. lbs.).
Check for proper operation of assembly by rotating the
inside manual lever and observing the operation of the
parking lock parts.
PARKING PAWL AND RETURN SPRING
Removal
If necessary, the parking pawl and return spring can be
removed as follows:
1. With an “easy out” remove parking lock shaft retaining plug
from the outside of the case.
2. Remove the parking lock shaft, pawl and return spring.
Inspection
1. Inspect the parking lock pawl for hairline cracks, burrs, or
other damage.
2.
Inspect the parking lock return spring for distortion, or
damage.
3. Inspect the parking lock shaft for damage and freeness of fit
with the pawl.
Assembly
1. Position the return spring on the parking lock pawl so the
long end of the spring is inboard pushing the pawl outward.
2. Locate the pawl and spring in the case and install the parking
lock shaft.
Check for proper operation.
3. Install the retaining plug with loctite sealer in the case with
a punch.
CASE AND ATTACHING PARTS
Inspection
1. Inspect the case for damage, cracks, porosity or
interconnected oil passages. (Fig. 14)
2.
Inspect the valve body case pad for flatness or land damage.
The oil passage lands are considred acceptable if a void exists
and is not in excess of 50% of the land. The condition of the
valve body pad can also be checked by inspecting the mating
face of the spacer plate to case gasket for a proper case land
impression.
3. Air check the case passages for restrictions or blockage.
4. Inspect the case internal clutch plate lugs for damage, or
wear.
5. Inspect the speedo, servo and accumulator bores for damage
and clearance relative to the mating parts.
6. Inspect all bolt holes for damaged threads. Helo-coils can be
used for repair.
7. Inspect the cooler line connectors for damage and proper
torque.
8. Inspect all snap ring grooves for damage.
9. Inspect the governor locating pin for proper length. A
incorrect length results in a damaged governor gear. (Fig. 15)
3RD ACCUMULATOR CHECK VALVE
Inspect the 3rd accumulator check valve for the following
conditions: Missing ball check, ball binding or stuck in the sleeve,
the oil feed slot in sleeve missing or restricted, improperly
assembled, loose fitting or not fully seated in the case or damaged.
(Fig. 16)
If the 3rd accumulator check valve assembly requires
replacement, perform the following:
1. Using a 6.3 (# 4 ) easy out, remove the check valve assembly
from the case by turning and pulling straight out. (Fig. 17)
2. Install a new check valve assembly, small end first, into the
case. Positioning the oil feed slot in the sleeve so that it faces
the servo cover.
3. Using a 9.5mm (3/8) dia. metal rod and hammer, drive the
check valve assembly until it is seated in the case.
GOVERNOR ASSEMBLY
Inspection
1. Wash all parts in cleaning solvent, air dry and blow out
passages.
2.
Inspect the governor body and valve for free operation, nicks,
burrs, scoring or galling.
3. Inspect the driven gear for nicks, damage or excessive
looseness.
H-700R4-60