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goodwrench9124, ASE Certified Technician
Category: Chevy
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99 astro: im replacing the diff..2wd..I cant find the torque spec

Resolved Question:

Im replacing the diff. in my 99 astro van 2wd. I cant find the torque spec for the carrier bearing caps. Can anyone help. also any tips for getting the diff. back in? thanks
Submitted: 8 years ago.
Category: Chevy
Expert:  goodwrench9124 replied 8 years ago.

Hello, and welcome to JA!!!! i have included the torque specs and set up instructions. anything else you need on this matter. please feel free to ask!!!


The backlash between the ring gear and the drive pinion should be between 0.08-0.25 mm (0.003-0.010 in) with a preferred backlash of 0.13-0.18 mm (0.005-0.007 in).





Pinion and Differential Case Bearing Preload, New Bearings

3.4-6.2 N·m

30-55 lb in

Pinion and Differential Case Bearing Preload, Used Bearings

2.8-5.1 N·m

25-45 lb in

Pinion Bearing Preload, New Bearings

1.7-3.4 N·m

15-30 lb in

Pinion Bearing Preload, Used Bearings

1.1-2.3 N·m

10-20 lb in





Bearing Cap Bolts

75 N·m

55 lb ft

Differential Housing Cover Bolts

30 N·m

22 lb ft

Fill Plug

33 N·m

24 lb ft

Pinion Shaft Lock Bolt

25 N·m

19 lb ft

Ring Gear Bolts

120 N·m

89 lb ft

Vent Clamp Bolt

16 N·m

12 lb ft

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