best fluid for 9 bolts
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Joined: Sep 2010
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From: Georgetown TX
Car: Base 91 'bird
Engine: 3.1 v6
Transmission: 4L60
Axle/Gears: 9-bolt 3.27 & PBR
Re: best fluid for 9 bolts
I've just been through this. If you do some searches you'll find many threads with many opinions and suggestions. I ended up just putting in what the store had. CRC Sta-Lube 80W90 with no additive. So far seems to work just fine.
Joined: Dec 2005
Posts: 6,499
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From: Macon, GA
Car: 1992 Camaro RS
Engine: Vortec headed 355, xe262
Transmission: T56
Axle/Gears: 9-bolt 3.70
Re: best fluid for 9 bolts
Yeah the only thing I can determine is it's probably best to NOT put additive in it. The additive helps lubricate clutches on clutch style LSD's so that they dont make noise. GM changed its mind on putting additives in the 9-bolt during the middle of hte production run, so I assume they changed their mind for a reason. So I just use whatever.
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