3:73 @ 75 mph = 2,270 rpm 4:11 @ 75 mph = 2,501 rpm You can find a calculator for this on Bowtie Overdrives. Just enter your tire size ,...
Yes change your lube and put the limited slip additive in it. I prefer the GM brand p/n 1052358 it works better than the kind that you can get...
Before I started tearing into a rear diff I would try changing the lube and add some limited slip additive in with it. I prefer the factory GM...
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