I have around 20k miles and it seems my diff doesn't work worth a ****. I had some sticky Nitto NT05s in 315/35/20 size and ran them till they were worn out with some drag strip passes, and hard driving. Just switched to 275/35/20 Mickey Thompson Street comps and they aren't as sticky. Usually only spin the right rear unless I'm turning left and incan break both loose. What diffs are y'all running for a good multi use lockup? I want something that locks both tires completely upon acceleration...