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Rear Differential Fluid Change With Valvoline Synpower
Time to change out the front and rear differential fluids. With respect to the rear differential which is limited slip, has anyone used Valvoline synpower 75-140 which states it is for limited slip differentials? Did you have to add any friction modifier? I'll use 75-90w on the front differential. I've already bought the Valvoline fluids. Thanks.
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