Chevy Trailblazer 4.2L Repair Information

Chevy Trailblazer 4.2L Rear End Repair Information

Here you can find information regarding repairs to the Chevy Trailblazer rear end system. These repairs include the rear control arms installation, the rear swaybar information and bolt torque specs, the rear diff fluid change procedures, and the rear end watts system installation. All of these repairs and procedures include in depth details on how to perform the replacement and or repair. They also contain all the detailed torque specs needed for each bolt involved in the repair.

Rear Control Arm Installation

The rear suspension of the Chevy Trailblazer consists of series of control arms which held support the axle and keep it attached to the vehicle. For this reason its always a good idea to use some loctite whenever messing around with rear control arm bolts. On both sides of the control arm there is a hole for a bolt to go through and a nut on the other side. You can tighten up these bolts and nuts to 80 ft-lbs. Along with the control arm there is a track bar and a torque bar which aid in vehicle suspension. The track bar fasteners can be tightened up to 89 ft-lbs while the torque bar can be tightened down to 96 ft-lbs.

Chevy Trailblazer Rear Control Arm Bolt/Nut Torque Spec : 80 ft-lbs

Chevy Trailblazer Rear Track Bar Torque Spec : 89 ft-lbs

Chevy Trailblazer Rear Torque Bar Torque Spec : 96 ft-lbs

 

Rear Differential Torque Specs

On the Chevy Trailblazer the ring gear bolts get tightened down to 95 ft-lbs. The rear carrier bearing caps can be tightened down to 80 ft-lbs. The differential drain plug should be tightened down to 24 ft-lbs. While the backing plate to the differential get tightened down to 30 ft-lbs.

Chevy Trailblazer Rear End Ring Gear Torque Specs : 95 ft-lbs

Chevy Trailblazer Rear Carrier Bearing Caps Torque Specs : 80 ft-lbs

Chevy Trailblazer Rear Differential Drain Plug Torque Specs : 24 ft-lbs

Chevy Trailblazer Rear Diff Backing Plate Torque Specs : 30 ft-lbs

 

Rear Shocks Installation

To replace the rear shocks on a Chevy Trailblazer you will need to remove two sets of bolts/nuts located at the bottom and top of the shock. Both of these fasteners can be accessed from underneath the vehicle by jacking it up and removing the wheel. To uninstall the old shock simply just remove both of the fasteners and the part will come out. When installing the new part reverse the procedure and tighten up the lower bolt to 62 ft-lbs and then the upper bolt to 22 ft-lbs.

Chevy Trailblazer Rear Shock Upper Bolt Torque Specs : 22 ft-lbs

Chevy Trailblazer Rear Shock Lower Bolt Torque Specs : 62 ft-lbs

 

Rear Stabilizer Bar Installation

The rear stabilizer bar on the Chevy Trailblazer consists of a series of brackets that hold it to the frame of the vehicle and a couple of endlink nuts that fasten it the the outer side of the car. To remove the swaybar you will need to jack up the front of the vehicle and remove both the endlink nuts as well as the brackets. To install the new swaybar you will need to move it back into the place as the old one and torque the axle sided nuts to 30 ft-lbs and then torque the frame bolts to 37 ft-lbs as well.

Chevy Trailblazer Rear Stabilizer to Axle Torque Spec : 30 ft-lbs

Chevy Trailblazer Rear Stabilizer to Frame Torque Spec : 37 ft-lbs

 

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Rear Control Arms Torque Specs
Rear Control Arm Bolts Torque Spec	80 ft-lbs
Rear Track Bar Bolts Torque Spec	89 ft-lbs
Rear Torque Bar Bolts Torque Spec	96 ft-lbs
Rear Differential / Axle Torque Specs
Rear End Ring Gear with E-locker Torque Spec	95 ft-lbs
Rear Carrier Bearing Cap Torque Spec	80 ft-lbs
Rear Differential Drain Plug Torque Spec	24 ft-lbs
Rear Axle Backing Plate Torque Spec	30 ft-lbs
Rear Shock Torque Specs
Rear Shock Upper Bolt Torque Spec	22 ft-lbs
Rear Shock Lower Bolt Torque Spec	62 ft-lbs
Rear Stabilizer Bar Torque Specs
Rear Stabilizer Bar Endlinks Torque Spec	30 ft-lbs
Rear Stabilizer Bracket Bolts Torque Spec	37 ft-lbs