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Rear diff oil weight

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Old 11-02-2007, 10:00 AM
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Rear diff oil weight
I'd like to change out my rear diff oil with a decent synethetic. What weight would you recommend? I was thinking about the royal purple 85-140 gear oil...Opinions?
 
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Old 11-02-2007, 10:32 AM
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thought it was 75-90
 
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Old 11-02-2007, 10:47 AM
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They have this weight also. Thats kind-of my question...which weight is best for the car.

http://www.royalpurple.com/gear-oil-pp.html
 
Last edited by joe603; 11-02-2007 at 10:56 AM.
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Old 11-08-2007, 10:33 AM
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anyone??
 
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Old 11-08-2007, 11:19 AM
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80w 90 is the specific weight. So you can with 75w90 or 80w90
 
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Old 11-08-2007, 04:21 PM
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So it's a no-go on the 75w-140 or 85w-140??
 
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Old 11-08-2007, 11:54 PM
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No-go , To much weight.
 
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Old 11-09-2007, 12:01 AM
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+1 on the 75-90/80-90. I use Kendall 80-90 Special Limited Slip gear oil.
-GP-
 
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Old 11-09-2007, 09:49 AM
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Thanks guys! I'll have to return it to summit racing...
 
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