rear differential service
TECH Addict
Joined: Jun 2009
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From: Tulsa, OK
An 85w-140 synth with diff additive. The broader viscosity index will allow the oil to perform better in all conditions, and most of the synthetics do a better job at resisting the inevitable acid formation. Whichever you decide to use, don't forget to use the additive or your posi won't love you anymore. Unless of course the oil you use already has the friction modifying additive already in it.
And yes, it's all available at the parts stores.
And yes, it's all available at the parts stores.
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Joined: Oct 2008
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From: Rochester, NY
The limited slip additive I've always used was the GM brand, I'd get it right from the dealership. I think it was like 8 or 9 dollars.
You can get most brands of gear oil like Mobil1, Castrol, Lucas etc at Autozone, but the higher end stuff like Redline you've gotta order off the internet. You'll need 2 bottles of gear oil.
Pour in all of the first gear oil bottle, then the little bottle of additive, then the second bottle of gear oil. You won't use all of the second gear oil bottle though. If I remember correctly it was like roughly 3/4 of the second will go in before it spills out of the overflow hole.
You can get most brands of gear oil like Mobil1, Castrol, Lucas etc at Autozone, but the higher end stuff like Redline you've gotta order off the internet. You'll need 2 bottles of gear oil.
Pour in all of the first gear oil bottle, then the little bottle of additive, then the second bottle of gear oil. You won't use all of the second gear oil bottle though. If I remember correctly it was like roughly 3/4 of the second will go in before it spills out of the overflow hole.
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i havent had any problems yet. the article i read says synthetic fluid will make the clutches slip and cause one wheel peel conditions.
TECH Addict
Joined: Jun 2009
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From: Tulsa, OK
TECH Addict
Joined: Jun 2009
Posts: 2,012
Likes: 0
From: Tulsa, OK