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Rear differential fluid


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Grabber and others on this site convinced me that Royal Purple is the way to go for the transmission fluid. Now, do folks feel the same way about changing the differential fluid to Royal Purple as well? Does it ave te same dramatic improvement. Any thoughts would be greatly appreciated. Have a great Thanksgiving

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When I installed the Shelby Axle Cover/Girdle, I went with the Royal Purple Max Gear, 75W-140. Afterwards, I did not notice any difference with the rear differential performance. I switched only because I prefer RP products.

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