Rear diff question
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Joined: Apr 2009
Posts: 263
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From: IL
Car: 89 IROC-Z
Engine: L98 5.7 liter
Transmission: TH700r4
Axle/Gears: limited slip 3.23
Rear diff question
Just wondering... I put Mobil1 75-90 in the rear diff when I replaced the cover gasket due to a leak, (from previous owners using a floor jack under the diff).
My question is with a posi-trac rear end and using Mobil1 full syn, do I have to add the GM friction additive?
My question is with a posi-trac rear end and using Mobil1 full syn, do I have to add the GM friction additive?
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Thread Starter
Member
Joined: Apr 2009
Posts: 263
Likes: 1
From: IL
Car: 89 IROC-Z
Engine: L98 5.7 liter
Transmission: TH700r4
Axle/Gears: limited slip 3.23
Re: Rear diff question
Ok, but why? Wouldn't adding a friction additive basically defeat the purpose of adding full synthetic to anything?
Oh and I figured out that the best way to remove and install a starter is to remove the y-pipe altogether. It eliminates having to rubiks cube the piece of ----. lol
Oh and I figured out that the best way to remove and install a starter is to remove the y-pipe altogether. It eliminates having to rubiks cube the piece of ----. lol
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Rear diff question
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