Buick Regal: Rear Differential Clutch Control Module Replacement
Removal Procedure
1. Prepare the control module for removal using the SPS programming support tool.
NOTE: The rear differential clutch control module can now be removed and replaced.
2. Raise and support the vehicle.
3. Differential Carrier Assembly - Drain.
4. Propeller Shaft - Remove.
5. Exhaust Muffler Assembly - Remove.
6. Rear Parking Brake Actuator - Disconnect.
7. Rear Wheel Drive Shaft - Remove.
8. Differential Carrier Assembly - Remove.
9.
.png)
Rear Differential Clutch Control Module Bolt(1) - Remove.
10.
.png)
Disconnect the connectors from the rear differential clutch control module (1 - 3).
11.
.png)
Rear Differential Clutch Control Module Wiring Harness(1) - Remove.
12.
.png)
Rear Differential Clutch Control Module(1) - Remove.
Installation Procedure
1.
.png)
Rear Differential Clutch Control Module(1) - Install.
2.
.png)
Rear Differential Clutch Control Module Wiring Harness(1) - Install.
3.
.png)
Reconnect the connectors from the rear differential clutch control module (1 - 3).
4.
.png)
CAUTION: Refer to Fastener Caution.
Rear Differential Clutch Control Module Bolt(1) - Install and tighten6 N.m (53 lb in).
5. Differential Carrier Assembly - Install.
6. Remove the hydraulic jack.
7. Rear Wheel Drive Shaft - Install.
8. Rear Parking Brake Actuator - Connect.
9. Exhaust Muffler Assembly - Install.
10. Propeller Shaft - Install.
11. Remove the supports and lower the vehicle.
12. Program the rear differential control module.
REAR AXLE LUBRICANT LEVEL INSPECTION
1. Raise and support the vehicle.
2. Clean the area around the rear axle fill plug.
3. Place a drain pan under the vehicle.
4.
.png)
Rear Axle Housing Fill Plug(1) - Remove.
5. Rear Axle Housing Filler Plug Gasket(2) - Remove.
6. Check the fluid level. If necessary, fill the differential to the bottom of the fill plug hole with the recommended fluid.
CAUTION: Refer to Component Fastener Tightening Caution.
NOTE: Clean and inspect the filler plug gasket (2) and replace if necessary.
7. Rear Axle Housing Filler Plug Gasket(2) - Install.
8. Rear Axle Housing Fill Plug(1) - Install and tighten 25 N.m (18 lb ft).
9. Lower the vehicle.
READ NEXT:
Differential Clutch Oil Inspection
1. Raise and support the vehicle.
2. Clean the area around the rear axle fill plug.
3. Place a drain pan under the vehicle.
4.
Differential Clutch Cover Plug(1) - Remove.
5. Rear Axle Housing Fi
Differential Carrier Bushing Replacement - Rear
Tools Required
J-45725 Cradle Bushing Replacer
For equivalent regional tool, refer to Special Tools.
Removal Procedure
1. Raise and support the vehicle.
2. Remove the rear differential assembly.
3
Rear Axle Vent Replacement
Preliminary Procedure
1. Raise and support the vehicle.
2. Remove the Differential Carrier Assembly.
Rear Axle Vent
NOTE:
Use an appropriate tool to remove and install.
REAR AXLE HOUSING VENT
SEE MORE:
Vehicle Information Menu
(VEHICLE) Items
Units : Choose between Metric or
US when Units is active. Press to
confirm the setting. This will change
the displays on the DIC to the type
of measurements you select.
Speed Warning : This display is
used to set the vehicle speed at
which the speed warning chime
sounds and the alert is displayed.
DTC P2734, P2738, or P2739
Diagnostic Instructions
Perform the Diagnostic System Check prior to using this diagnostic
procedure: Refer to Diagnostic System
Check - Vehicle
Review the description of Strategy Based Diagnosis: Refer to Strategy
Based Diagnosis
An overview of each diagnostic category can be found here: R
