C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Rear Differential Gear Lube?

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Old Jan 21, 2003 | 02:59 PM
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Default Rear Differential Gear Lube?

I'm going to change the gear lube in my '85 (as soon as I'm able to use my right hand again-I broke it.) I've seen all kinds of different weights, synthetic and conventional lubes. What do you guys recommend? Also, how much limited slip additive is needed for the job? Thanks for the help, guys! :chevy
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Old Jan 21, 2003 | 03:53 PM
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Default Re: Rear Differential Gear Lube? (H P Bushrod)

Use the GM recommended gear oil or 90 weight that you can find at the discount parts houses. Add one bottle of GM rear end ffuid.
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Old Jan 21, 2003 | 04:01 PM
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Default Re: Rear Differential Gear Lube? (6 speed Sid)

I vote for Mobil 1 with GM anti slip Additive
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Old Jan 21, 2003 | 06:08 PM
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Default Re: Rear Differential Gear Lube? (H P Bushrod)

There are a few people who believe the GM stuff is good... that is only because they have never used VP Racing Products Semisynthetic gear lube.

You use it with no additives. The first thing you notice is the car drives smoother. Especially backing our of parking spots. You even notice it feels easier to accelerate...it's almost amazing the differeice.

Get it here:
http://www.vpracingfuels.com/GL100.h...D802373892993D


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Old Jan 21, 2003 | 08:08 PM
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Default Re: Rear Differential Gear Lube? (H P Bushrod)

I have Richmond synthetic with one bottle of additive.
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Old Jan 21, 2003 | 08:46 PM
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Default Re: Rear Differential Gear Lube? (Mr Mojo)

I use the GM lube with the GM additive.

Vic
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Old Jan 21, 2003 | 09:23 PM
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Default Re: Rear Differential Gear Lube? (Vic'89)

and i use redline 75-90 with a lil GM modifier.....isn't this lovely, no one agrees :lol:
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Old Jan 22, 2003 | 11:29 AM
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Default Re: Rear Differential Gear Lube? (Vic'89)

I use the GM lube with the GM additive.

Vic
Same here
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Old Jan 22, 2003 | 01:12 PM
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Default Re: Rear Differential Gear Lube? (gtsyellow)

I use the 75-90 Redline synthetic as well and use one bottle of the additive (Redline brand). It takes about a quart and a half, plus the additive to fill the pumpkin properly.
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Old Jan 22, 2003 | 09:19 PM
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Default Re: Rear Differential Gear Lube? (Vette92)

I use the 75-90 Redline synthetic as well and use one bottle of the additive (Redline brand).
See...thats what I mean...no one who has tried the VP stuff ever has to use any additive. The stuff works, and works better than ANY other rear gear lube on the planet. Every one who used it will not only say they used it...but they will swear by it.

I found that out myself after draining fluid about 12 times and trying different brands with additives...none would stop the clicking on my tightly built 12 bolt except the VP.
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Old Jan 22, 2003 | 09:48 PM
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Default Re: Rear Differential Gear Lube? (BBA)

I also use the REDLINE w/ GM additive, no problems.
Matt
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