tjkj2002
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- Joined
- Dec 17, 2006
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Couple of big name axle builders say use only dino 85w-140,I'll trust there opinion since they build those $10,000+ diffs.Besides syn gear oil is only recommended to increase mpg's by maybe 1/10th of a mpg.Interesting recommendation since Chrysler does spec 75w-140 synthetic for the front diff, and also for the rear in towing/offroad applications...