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Author Topic: 1979 C3 Diff fluid?  (Read 6263 times)

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Offline Lefty

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1979 C3 Diff fluid?
« 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
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Offline Vettech

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Re: 1979 C3 Diff fluid?
« Reply #1 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......
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Offline bfit

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Re: 1979 C3 Diff fluid?
« Reply #2 on: August 03, 2020, 03:54:23 PM »
I run Castrol Limslip 90, no additive's required.
Bfit
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Offline sirfixalot

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Re: 1979 C3 Diff fluid?
« Reply #3 on: August 03, 2020, 06:53:17 PM »
GM LSD additive is available from Chev parts Yennora and I think also Holden dealers
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Offline Lefty

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Re: 1979 C3 Diff fluid?
« Reply #4 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
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