Limited Slip Additive / Gear Oil question
08-08-2011, 01:30 PM
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Car: 1991 Camaro Z28
Engine: 350 TPI
Transmission: T56 6-Speed
Limited Slip Additive / Gear Oil question
My 4th Gen 10 Bolt Posi Rear on my 91 Z28 is leaking fluid. The car has barely been driven since I had the Motive 3:73 gears installed a few years back. Either they didn't use enough RTV or the Paper Gasket along with the RTV isn't working together too well. I plan to just reseal it with RTV only this time. I just got back from Autozone where I got two bottles of the Valvoline 80W-90 Gear oil (Not synthetic) that says "Limited Slip" right on the bottle. I also got ripped off at the dealer (IMO) for $18.xx on the 4oz bottle of the GM Limited Slip Additive. I just wanted to make sure, do I still use the additive since the gear oil says Limited Slip on it already? Thanks!
08-08-2011, 01:45 PM
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Limited Slip Additive / Gear Oil question
The additive helps the clutches to be smooth around corners. If the lube already has it, its not a good as GM/ford additive, lil extra wont hurt.
08-08-2011, 01:54 PM
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Car: 1991 Camaro Z28
Engine: 350 TPI
Transmission: T56 6-Speed
Re: Limited Slip Additive / Gear Oil question
That's kinda what I figured. At first I wasn't going to go to the dealer, then I did and almost didn't buy it because of the ridiculous price, but I said the hell with it and bought it anyway. Thanks.
08-08-2011, 06:42 PM
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Limited Slip Additive / Gear Oil question
Read the fine print on the gear lube carefully!!! It probably says something like "compatible with" or "meets specs for" or some kind of weasel-wording like that; which is NOT the same as, "already contains additive".
You still need the stinky juice from GM.
You still need the stinky juice from GM.
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