NSW Corvettes

Technical Tips => Transmissions - Differentials => Topic started by: Lefty on August 03, 2020, 09:03:54 AM

Title: 1979 C3 Diff fluid?
Post by: Lefty on August 03, 2020, 09:03:54 AM

Hi,
Just wondering what fluid you may recommend and where your getting it from.
C3 1979
Many thanks in advance,
Best
Lefty

Title: Re: 1979 C3 Diff fluid?
Post by: Vettech on August 03, 2020, 02:44:55 PM

I'm not a diff expert, maybe Bfit, SR Performance guys.

BUT!

I believe they are Limited Slip Diffs, and require a GM spec oil + an ounce or 2 of a special additive.

I'm sure someone with a better understanding will chine in......

Title: Re: 1979 C3 Diff fluid?
Post by: bfit on August 03, 2020, 03:54:23 PM

I run Castrol Limslip 90, no additive's required.
Bfit

Title: Re: 1979 C3 Diff fluid?
Post by: sirfixalot on August 03, 2020, 06:53:17 PM

GM LSD additive is available from Chev parts Yennora and I think also Holden dealers

Title: Re: 1979 C3 Diff fluid?
Post by: Lefty on August 03, 2020, 08:07:42 PM

Thanks that’s all very helpful. I looked at an ac delco
 product and additive and it needs to come from the states, which takes some time.
Cheers
Lefty