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Originally Posted by pano911
Bruce, checked out your car profile; looks like you're dealing with similar power. Is your car on the road yet?? How's that Detroit Locker on the street? I'm trying to decide between 9" True Trac 31-spline, 9"Locker 35-spline, Dana 60 True trac 35-spline....
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Not on the road yet. Jody has it right - if you use street tires only, then you could get away with 31 spline with TruTrac, but if you ever want to take it to the track with slicks you will need 35 spline axles with the Locker. Did a bunch of research on this and spoke with the techies at Currie, Mark Williams, Strange and Moser. They concurred. Also, if you do that go with the Pro Nodular Iron case with 3.25" (not 3.0625") bore spacing. It's only a $90 upcharge and has almost zero deflection.