A/T - THM 440 On-Vehicle Service Procedures
88pontiac02Bulletin Number: 88-7-24
Reference Number: 837101
Publish Date: 3/88
Subject: THM 440-T4 TRANSAXLE ON-VEHICLE SERVICE PROCEDURES FOR CASE SIDE COVER AND RELATED COMPONENTS
Models
Affected: 1988 GRAND PRIX MODELS
SERVICE MANUAL UPDATE
In addition to those listed in the 1988 service manual, the following automatic transaxle components can be serviced on-vehicle:
^ Case side cover pan and/or gaskets
^ Pump
^ Valve Body
^ Pressure Switch, 3rd and 4th
^ TCC Solenoid and Wiring Harness
The following procedure steps should be added to the 1988 Service Manual and will be included in all future manuals.
(See Illustrations as well as the chart below)
Labor Labor
Operation Time
Number
Case Side Cover Pan and/or Gaskets K6540 3.4 Hr.
Pump and Valve K6570 4.3 Hr.
Pressure Switch, 3rd and 4th K6515 3.5 Hr.
TCC Solenoid and Wiring Harness K6520 3.5 Hr.
FIGURE 1 - CASE SIDE COVER, PUMP AND VALVE BODY:
CASE SIDE COVER PAN AND/OR GASKETS Figure 1 Tools Required:
J 28467-A Engine Support Fixture J 36462 Engine Support Adapter Leg
vRemove or Disconnect
1. Negative battery cable
2. Install engine support fixture J 28467-A along with support leg J 36462.
3. Air cleaner housing and intake tube
4. Torque struts at engine mounts
5. Two crossover pipe-to-left manifold bolts
6. Loosen crossover pipe-to-right manifold clamp.
7. Two bolts at top of transaxle mount bracket. Pry crossover pipe to allow removal of front bolt.
NOTICE: Do not pry on crossover pipe heat shield. If shield is bent, heat damage to other components may occur.
8. Raise vehicle and suitably support (see Section 0A).
9. Left front wheel and tire
10. Left front brake caliper and bracket assembly and hang from vehicle vImportant
^ Do not allow to hang from brake hose.
^ Install two lug nuts (flat side to rotor) to retain rotor.
11. Four bolts at hub and bearing assembly
12. Left drive axle (see Section 4D)
13. Left lower ball joint
14. Left inner fender splash shield
15. Pinch bolt at intermediate steering shaft (see Section 3B4)
CAUTION: Failure to disconnect the intermediate shaft from the rack and pinion steering gear stub shaft can result in damage to the steering gear and/or intermediate shaft. This damage may cause loss of steering control which could result in an accident and possible personal injury.
16. Support right and left sides of frame with jackstands.
17. Right frame to body bolts (see Section 2A)
18. Left frame to body bolts, and adjust jackstand to lower left side of frame.
19. Transaxle mount and mount support
20. Lower the left side of engine/transaxle approximately 4-6 inches, using the engine support fixture.
21. Two clamps holding wiring harness to transaxle mount bracket
22. Transaxle mount bracket
23. Position drain pan under transaxle.
24. Case side cover pan and gasket
vClean
^ Case and side cover gasket surfaces vInstall or Connect
1. Case side cover pan and gasket
2. Case side cover bolts and channel plate flange nuts
vTighten
^ Torque bolts and nuts to 14 N-m (10 ft. lbs.)
3. Transaxle mount bracket (start upper bolts first)
4. Two wiring harness clamps
5. Raise left side of engine/transaxle using engine support fixture.
6. Transaxle mount and mount support
7. Raise left side of frame and install four frameto-body bolts.
vTighten
^ Torque transaxle mount/mount support nuts/bolts to 48 N-m (35 ft.lbs.).
^ Torque transaxle mount-to-bracket nuts to 30 N-m (22 ft.lbs.).
^ Torque front transaxle mount bracket bolts to 48 N-m (35 ft.lbs.).
^ Torque frame-to-body bolts to 140 N-m (103 ft.lbs.).
8. Remove jackstands.
9. Pinch bolt at intermediate steering shaft (see Section 3B4)
10. Left inner fender splash shield
11. Left lower ball joint
12. Left drive axle (see Section 4D)
13. Four bolts at hub and bearing assembly
14. Left front brake caliper and bracket
15. Left front wheel and tire
16. Lower vehicle
17. Two bolts at top of transaxle mount bracket
vTighten
^ Torque bolts to 82 N-m (61 ft.lbs.).
18. Two crossover pipe-to-left manifold bolts
19. Tighten crossover-to-right manifold clamp.
20. Torque struts at engine mounts
21. Remove engine support fixture.
22. Air cleaner housing and intake tube
23. Negative battery cable
vInspect
^ For proper completion of repairs
^ For proper fluid level, adjust as necessary.
^ For fluid leaks
Pump Figure 1 vRemove or Disconnect
1. Negative battery cable
2. Case side cover pan
3. Electrical connections from pressure switches
4. Pump to valve body bolts (14)
NOTICE: Do not remove the three #40 torx bolts which hold the pump assembly together.
^ For pump inspection, see Section 440-T4 Unit Repair. vInstall or Connect
1. Pump to valve body
2. Valve body bolts vTighten
^ Torque bolts to 14 N-m (10 ft.lbs.)
3. Electrical connections to pressure switches
4. Case side cover pan
5. Negative battery cable
6. Refill transaxle to proper level.
VALVE BODY Figure 1 vRemove or Disconnect
1. Negative battery cable
2. Case side cover pan
3. Pump
4. 1-2 servo pipe clip from valve body
5. Valve body to channel plate bolts
6. Valve body, keeping the spacer plate with the transaxle
7. Spacer plate and gasket
^ For checkball locations, see Section 440- T4 Unit Repair.
vInstall or Connect
1. Retain checkballs in their proper locations with petroleum jelly.
2. Spacer plate and gasket
3. Valve body and gasket
4. Valve body to channel plate bolts
vTighten
^ Torque bolts to 14 N-m (10 ft.lbs.)
vImportant
^ Do not use impact type tools on the valve body or pump assembly.
5. 1-2 servo pipe clip to valve body
6. Pump
7. Case side cover pan
8. Negative battery cable
9. Refill transaxle to proper level
10. Adjust T.V. cable.
FIGURE 2 - OIL PRESSURE SWITCHES AND WIRING HARNESS:
PRESSURE SWITCH, 3RD AND 4TH Figure 2 vRemove or Disconnect
1. Negative battery cable
2. Case side cover pan
3. Pressure switches at transaxle valve body
vInstall or Connect
1. Pressure switches
2. Case side cover pan, new gasket and attaching bolts
vTighten
^ Torque bolts to 14 N-m (10 ft.lbs.)
3. Negative battery cable
4. Refill transaxle to proper level
TCC SOLENOID AND WIRING HARNESS
vRemove or Disconnect
1. Negative battery cable
2. Case side cover pan
3. Screws retaining solenoid
4. Electrical connector and solenoid
vInstall or Connect
1. Electrical connector and solenoid
2. Retaining screws
vTighten
^ Torque screws to 14 N-m (10 ft.lbs.)
3. Case side cover pan, new gasket and attaching bolts
vTighten
^ Torque bolts to 14 N-m (10 ft.lbs.)
4. Negative battery cable
5. Refill transaxle to proper level