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Trying to figure out the best route to go with for filling up my rear now that it's done. I have an 8.8 with a 31 spline traction lock and 410 gears. I'm not sure if I should go with the 75w90 or the 80w140. Car is about 50/50 street/strip. I've had people tell me both ways. I figure I'll see what you all say here. Thanks!
 

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i'll be using RP 75/90

8.8, 31 spline T-lok, 3.55's

im sure you are fine with either
 
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