9-bolt axle codes
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Joined: Aug 2004
Posts: 48
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From: Bloomington,IL
Car: 1985 Trans Am
Engine: Chevrolet 355
Transmission: Borg Warner W.C. manual cog
Axle/Gears: B W 9-bolt 3.45 Limited Slip
9-bolt axle codes
Ok ,I know this will sound dumb ,but i can not locate an axle code on either of the 9-bolts i have .I have scraped with a wire brush on the frt. of the rt. axle tube in the area between the backing plate and lower control arm mt. and near the ct. section. One is an 85 drum and the other is an 88 disc brake . Do all 9-bolts have a code stamped on them? I work in a collision shop so i have located them on , say for example Chevy trucks no problem. Can anyone send me a picture of one , or tell me where they find them. Thanks
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: 9-bolt axle codes
The 9-bolts I have seen have a tag bolted to the cover that has the ratio on it. If the tag is gone, the rear end has been serviced.
Joined: Nov 2000
Posts: 1,420
Likes: 5
From: Byhalia MS, just south of memphis
Car: 89 Firebird
Engine: 6.0 LS
Transmission: T-56
Axle/Gears: 3.70
Re: 9-bolt axle codes
you can also pull the diff cover and check the ratio as its on the side of the ring gear.
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