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94 read diff, what fluid? Do I need friction modifier?

protomind

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Joined
February 19, 2008
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Year, Model & Trim Level
94 Limited Edition
I just put in 75/90 weight mobil1 gear oil in the rear diff, I did not add a friction modifier at all, I have a 3.27 non limited slip rear end. I was wondering though after seeing some other posts, should I have put in that 75/150 weight oil in the rear? I will be doing some towing, a 3200lb gross weight trailer about 650 miles, I am not sure is that affects anything though.

I REALLY hope that I do not have to drain the rear diff and put in a heavier oil, but I will if I must.
 




JDraper

Somewhat Functional
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January 11, 2001
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'18 XLT
No friction modifier needed and you should be fine with the oil.
 




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