Hummer H1 Service Manual page 336

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1-2 SHIFT
SOLENOID A
CONVERTER
CLUTCH
SOLENOID
CLIP
PRESSURE
CONTROL
SOLENOID
Figure 5-39: Solenoid Identification
Valve Body Installation
1. Install replacement solenoid or wiring harness as required.
2. Verify that valve body spacer plate and gasket are in
position. Also be sure check-balls were not displaced.
There should be eight check-balls.
3. Install valve body guide pins J–25025-B in transmission
case.
4. Carefully position valve body on guide pins and
transmission case. Install 2-3 bolts to hold valve body in
place and remove guide pins.
5. Install pressure switch, dipstick stop, harness clamp and
detent spring but do not fully tighten bolts at this time.
6. Install lube pipe, retainer, and pipe clamp (Figure 5-38).
7. Tighten valve body bolts to 97 lb-in. (11 N•m) torque.
Start at center and work outward in a spiral pattern
(Figure 5-40).
Figure 5-40: Valve Body Bolt Tightening Sequence
(in Numerical Order)
05745159
2-3 SHIFT
SOLENOID B
CLAMP
Transmission/Transfer Case
CAUTION: The valve body bolts must be tightened to speci-
fied torque and in the indicated pattern. Overtightening or ran-
dom tightening will distort the valve body resulting in valve
bind, cross leakage, and shift problems.
8. Connect wire harness to solenoids and switch.
9. Install oil filter and oil pan.
10. Refill transmission with Dexron III.
PARK LOCK COMPONENT SERVICE
The park lock components can be serviced without removing
the transmission.
Access to the park lock components requires removal of the oil
pan and valve body. Part replacement procedure is as follows.
Park Lock Component Replacement
1. Remove oil pan and valve body as described in this sec-
tion.
2. Remove nut that retains detent on shaft (Figure 5-41).
Then remove shaft pin.
3. Remove park pawl bracket bolt and bracket.
4. Remove detent and actuator rod (Figure 5-41).
5. Remove park pawl stud, retainer, spring, shaft, and plug
(Figure 5-41).
6. Clean parts to be reused with solvent, dry with compressed
air, and lubricate with Dexron III.
7. Install pawl shaft in case. Then install pawl on shaft.
Install new shaft cup plug in case with 5/16 in. (7.9 mm)
diameter rod.
8. Install pawl retainer and return spring (Figure 5-41).
9. Assemble detent and actuator rod. Then install rod over
pawl.
10. Install detent shaft and seal. Be sure shaft is properly
seated in detent.
11. Install detent nut on shaft. Tighten nut to 18 lb-ft (24 N•m)
torque.
12. Install shaft pin.
13. Install actuator rod bracket and bolts. Tighten bolts to 18
lb-ft (24 N•m) torque.
14. Install return spring stud.
15. Install valve body, oil filter and oil pan.
16. Refill transmission with Dexron III. Correct fluid level is
at top, or within cross hatch area on dipstick, with fluid
hot, engine idling and transmission in park.
5-137