Royal Purple Gear Lube Oil

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Apr 10, 2009 | 02:25 PM

KITT1983

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From: Boston, MA

Car: 1983 Pontiac Trans Am Daytona 500

Engine: Crossfire 305ci V8

Transmission: Jasper 700R4 4 speed Automatic

Axle/Gears: 3.23 limited slip/posi

Royal Purple Gear Lube Oil

GM recommends 80w, 80W90 GL5 gear lube, + GM additive #1052271 for limited slip differentials for my KITT

I want to use Royal Purple 75w90 Gear lube to my rear end, will it screw up my rear end? Should I add the additive or not? or use something else?

Apr 11, 2009 | 09:18 AM

1985blktransam

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From: Northern New Jersey

Car: 1985 Firebird Trans Am

Engine: 5.0 Liter Engine

Transmission: 700R4

Axle/Gears: 3.08

Re: Royal Purple Gear Lube Oil

Hi:

It will not hurt the rear End. Just stay with the same weight that GM Recommends. I

I had used the Royal Purple Gear oil before in my 85 Trans Am with Australian 9 Bolt Rear End, it was good. I did not add any other additives. I have since switched to Amsoil Gear Oil for the Rear End.

I have been using Amsoil Syntheic Oils in the engine and their products seem to work very well my cars. Just a personal thing I guess.

Thanks
Rob