Source for re gearing a 9 bolt Borg and Warner rear axle
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Junior Member
Joined: Sep 2020
Posts: 78
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From: MI
Car: 1986 Pontiac Trans Am WS6
Engine: 383 Stroker
Transmission: TCI 725hp built 700R4
Axle/Gears: 94 Camaro 10 bolt. Posi 3.23
Source for re gearing a 9 bolt Borg and Warner rear axle
Hello, I have my trans am, which I am swapping a 350 into. I was wondering since I can run a shorter gear without the TPI setup where can I get a 3.45 locker for my rear end. Thanks, Sean
Joined: Sep 2005
Posts: 27,882
Likes: 2,434
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Source for re gearing a 9 bolt Borg and Warner rear axle
3.45 is tough to find. Don't know if it's even available anymore.
3.73 (41 & 11... different from the original 3.70 37 & 10) is pretty popular though.
There's a somewhat recent post about "thanks keykey" where that particular member's instructions were followed by someone else to put a new Torsen, which is available for it, into a 9-bolt. Includes sourcing info if memory serves. Search this forum for that phrase.
3.73 (41 & 11... different from the original 3.70 37 & 10) is pretty popular though.
There's a somewhat recent post about "thanks keykey" where that particular member's instructions were followed by someone else to put a new Torsen, which is available for it, into a 9-bolt. Includes sourcing info if memory serves. Search this forum for that phrase.
Supreme Member
Joined: Oct 2004
Posts: 4,526
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Source for re gearing a 9 bolt Borg and Warner rear axle
Joined: Sep 2005
Posts: 27,882
Likes: 2,434
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Source for re gearing a 9 bolt Borg and Warner rear axle
Not sure if that domain has anyone ever looking at it anymore. (from the inside that is)
Seems like most people for the last several years who have actually been able to (a) order things and (b) they show up, use some other site. I could be wrong though.
Seems like most people for the last several years who have actually been able to (a) order things and (b) they show up, use some other site. I could be wrong though.
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