Chevy Astro 4.3L Repair Information

Chevy Astro 4.3L Rear End Repair Information

Here you can find information regarding repairs to the Chevy Astro 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 Leaf Spring Installation

The rear suspension of the Chevy Astro consists of leaf springs and shock absorbers. The leaf springs are held together using a series of mounts and shackles. The front leaf spring hanger mount needs to be tightened down to 140 ft-lbs. While the shackle bolts need to be tightened down to 70 ft-lbs. There is also a centering bolt on the leaf springs which should be tightened down to 33 ft-lbs if removed.

Chevy Astro Front Leaf Spring Hanger Torque Spec : 140 ft-lbs

Chevy Astro Shackle Bolts Torque Spec : 70 ft-lbs

Chevy Astro Leaf Spring Center Pin Torque Spec : 37 ft-lbs

 

Rear Differential Torque Specs

On the Chevy Astro rear axle the U bolts need to be tightened down to 110 ft-lbs. 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 Astro Rear Axle U-Bolts Torque Specs : 110 ft-lbs

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

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

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

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

 

Rear Shocks Installation

To replace the rear shocks on a Chevy Astro 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 both bolts to 85 ft-lbs.

Chevy Astro Rear Shock Upper Bolt Torque Specs : 85 ft-lbs

Chevy Astro Rear Shock Lower Bolt Torque Specs : 85 ft-lbs

 

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Rear Leaf Spring Torque Specs
Front Leaf Spring Mount Torque Spec	140 ft-lbs
Leaf Spring Shackle Bolts Torque Spec	70 ft-lbs
Leaf Spring Center Pin Torque Spec	37 ft-lbs
Rear Differential / Axle Torque Specs
Rear Axle U-Bolts Torque Spec	110 ft-lbs
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	85 ft-lbs
Rear Shock Lower Bolt Torque Spec	85 ft-lbs