It's a 8 3/4 with a factory sure grip and Richmond 4.10 gears, I had probs with traction but bigger skids and bit more tire temp helped, but it did sorta feel like that in the car, but 60 foot sorta says otherwise I think. just didn't feel right and the whole drivetrain is new to the car so still dialing it in, but I'm 19 yr old and after advice to help
