Transmissions and Drivetrain Need help with your trans? Problems with your axle?

differential oil type?

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Old

03-24-2005, 12:30 PM

#1

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differential oil type?

I accidentally bought the wrong oil grade for the differential... I can't remember what it should officially be, but I have:

"Castrol Differential transmission fluid" EPX 80W-90

How similar is that to stock? -is that going to be ok to use??

Andrew H is offline

Old

03-24-2005, 05:34 PM

#2

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Car: Met. Silver 85 IROC/Sold

Engine: 350 HO Deluxe (350ci/330hp)

Transmission: T-5 (Non-WC)

Axle/Gears: Limited Slip 3.23's

Many members use Mobil 1, 75-90 in the rear end along with GM posi additive, should you have a limited slip.

JamesC

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03-24-2005, 05:34 PM

#3

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sounds like it would work. i use mobil 1 75w-90 synthetic along with the gm posi additive.

ede is offline

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