Rear Subframe: Service and Repair

Rear Subframe
This is a "Trustmark Authoring Standards (TAS) Repair Procedure"
- TAS style procedures can be identified by steps that have no accompanying step text and the magenta color of the electrical connectors and fasteners such as nuts, bolts, clamps or clips.
- TAS removal and installation procedures use a sequence of color illustrations to indicate the order to be followed when removing/disassembling or installing/assembling a component.
- Many of the TAS procedures will have the installation information within the removal steps.
- The TAS color illustrations use a variety of symbols to indicate important details of the procedures. It is important to understand these symbols in order to properly used the TAS procedures.
Refer to How to Use TAS Procedures and TAS Symbol Glossary at Vehicle | Description and Operation for additional information on these TAS procedures.
For additional information, refer to How to Use TAS Procedures

Removal









1 Remove the stowage compartment.

NOTE:
Use an additional wrench to prevent the component from rotating.
2 Remove the adjusting nut and disconnect the front parking brake cable.




3 Release the rear parking brake cables and remove the compensator.
4 Remove the rear quarter trim panels.
For additional information, refer to Rear Quarter Trim Panel Rear Quarter Trim Panel





5 Repeat the above procedure on the opposite hand.





6 Repeat the above procedure on the opposite hand.

WARNING: Make sure to support the vehicle with axle stands.
7 Raise and support the vehicle.
8 Remove both rear wheels and tires.
For additional information, refer to Wheel and Tire Service and Repair
9 If installed, remove the rear suspension height sensor.
For additional information, refer to Rear Suspension Height Sensor Service and Repair

10 Remove the rear muffler.
For additional information, refer to Exhaust System Service and Repair





CAUTION: Mark the position of the driveshaft flange in relation to the drive pinion flange.

CAUTION: To avoid damage to the joint or gaiter, do not allow the driveshaft to hang.

11 Discard the bolts.





12 Repeat the above procedure on the opposite hand.









13 Repeat the above procedure on the opposite hand.





CAUTION: Make sure that no load is placed on the brake hose.

14 Tie the rear brake caliper aside.

15 Repeat the above procedure on the opposite hand.





CAUTION: Make sure the bushing(s) or isolator(s), are not strained or left unsupported during this procedure.

16 Release the trailing arm to body bracket.

17 Repeat the above procedure on the opposite hand.

18 Support the subframe.
E70 - Powertrain Jack





19 Carefully lower the subframe for access to the differential breather lines.





CAUTION: Make sure that no components catch.

20 With assistance, remove the rear subframe assembly.





NOTE:
Do not disassemble further if the component is removed for access only.













21 Discard the bolts.





22 Discard the bolts.

23 With assistance, remove the rear subframe.

Installation

CAUTION: Make sure that new bolts are installed.
Clean the component mating faces.
With assistance, install the subframe.
With assistance, align and secure the differential.
Tighten the rear bolts.
Torque to: 110 Nm
Tighten the front bolts.
Torque to: 175 Nm

CAUTION: Make sure that new bolts are installed.
1 Align the suspension arms to the subframe and install the bolts, do not fully tighten at this stage.
2 Using the special tool, support the subframe.
3 Connect the transmission breather lines.

CAUTION: Make sure that no components catch.

CAUTION: Make sure that new bolts are installed.
4 With assistance, position the subframe to the body and tighten the bolts.
Torque to: 175 Nm

CAUTION: Make sure that new bolts are installed.
5 Install the stabilizer clamp bolts, but do not tighten fully at this stage.
6 Connect the Active On-demand Coupling module electrical connector.
7 Remove the powertrain jack.
E70 - Powertrain Jack

CAUTION: Make sure that new bolts are installed.
8 Install the trailing arm to body brackets.
Torque to: 110 Nm

CAUTION: Make sure that the brake hose is not twisted and is correctly located.
Clean the component mating faces.
Install the brake caliper anchor plate.
Torque to: 110 Nm
Repeat the above procedure for the other side.
Secure the wheel speed sensor and lead.
Torque to: 5 Nm
Secure the lead in the clips.
Repeat the above procedure for the other side.
9 LH side: Connect the ride height sensor electrical connector.
Position and secure the rear shock absorbers.
Install both mass dampers.
Torque to: 25 Nm
Repeat the above procedure for the other side.





CAUTION: Make sure that new bolts are installed.
Clean the component mating faces.
Connect the driveshaft to the rear flange.
Torque to: 40 Nm

10 Install the parking brake cables to the guide tubes.

11 Connect the parking brake cables.

12 Adjust the parking brake.
For additional information, refer to Parking Brake Cable Adjustment Adjustments

13 Install the rear muffler.
For additional information, refer to Exhaust System Service and Repair

14 Install the rear quarter trim panels.
For additional information, refer to Rear Quarter Trim Panel Rear Quarter Trim Panel

15 Install the rear suspension height sensor.
For additional information, refer to Rear Suspension Height Sensor Service and Repair

16 Install the wheels and tires.
For additional information, refer to Wheel and Tire Service and Repair

CAUTION: Nuts and bolts must be tightened with the weight of the vehicle on the suspension.

17 Tighten the stabilizer bar clamp bolts.
Torque to: 60 Nm

CAUTION: Nuts and bolts must be tightened with the weight of the vehicle on the suspension.
Tighten the suspension arms to the subframe.
Torque to: 175 Nm
During installation, do not tighten the nuts and bolts until the 4 wheel alignment procedure has been carried out.

18 Carry out a complete vehicle geometry check and adjustment.