Borg & Warner 9-Bolt Differential Fluid?
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Joined: Jul 2006
Posts: 63
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Car: 1985 TRANSAM
Engine: 305
Transmission: 700R4
Axle/Gears: 3.27
Borg & Warner 9-Bolt Differential Fluid?
I have a 1985 Transam and would like to change the rear diff fluid...
What is the factory recommended fluid to use? and additive?
What is the factory recommended fluid to use? and additive?
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Joined: Jul 2007
Posts: 777
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From: Tampa/New Hampshire
Car: 91 camaro RS, 87 T/A
Engine: 350 TBI, 305 TPI
Transmission: 700r4
Axle/Gears: 4th Gen 3.42/BW 3.45
Re: Borg & Warner 9-Bolt Differential Fluid?
Any gear oil from the auto parts store. i have used royal purple and mobil 1. 75-90 or something close to that. Some people say the 9 bolt does not need the additive, and others say it does. I only use the GM additive that you get form the dealership. The 
is you friend. Hope this helps you.
is you friend. Hope this helps you. 
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HoosierinWA
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Oct 7, 2015 10:15 AM
