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Old Feb 5, 2016 | 12:53 PM
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What gear oil 80w-90 (synthetic or conventional) that is used with 4 oz of GM anti-slip would you recommend in a 1970 Corvette LT-1 posi-traction differential?

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Old Feb 5, 2016 | 01:25 PM
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Originally Posted by clatgeo
What gear oil 80w-90 (synthetic or conventional) that is used with 4 oz of GM anti-slip would you recommend in a 1970 Corvette LT-1 posi-traction differential?

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Been a Mobile 1 user a while now: Have it in my 72 LT1.
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Old Feb 5, 2016 | 02:36 PM
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Castrol or Valvoline or any major brand conventional oil intended for limited slip differentials
Last edited by MelWff; Feb 5, 2016 at 02:37 PM.
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Old Feb 5, 2016 | 04:35 PM
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Any gear oil with GL-5 rating will do.
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Old Feb 5, 2016 | 05:03 PM
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Synthetic GL-5. I have used Mobil 1 75W-90 for 25 years now with no additive...Diff operates perfectly...
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Old Feb 5, 2016 | 08:42 PM
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Mobil One 75w140 Synthetic with 6 oz Friction modifier .. have used it in dozens ..
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