just bought a new rear end and have question

[Rev]

Is this just a center section, or do you have it installed? If it's not installed, count the teeth on the ring and pinion. Ring gear teeth/ pinion teeth = ratio. If it's already installed, jack up one side of the rear, leaving the other on the ground with trhe car in neutral. Try to turn the raised wheel by hand. If you can't, then you have a limited slip if it's a Traction-Lock. I think an Auburn will behave the same way. Currie TSD's don't do this. They only hook up under torque/stress and won't lock otherwise. Test the drive shaft/wheel ratios to find the ratio if it's installed.

Rev

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'66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph
1/4 mi.