Quote Originally Posted by GiddieUp View Post
I got a 7 in lift with 315s and its got about 146k and I haha that's the problem I gotta buy a lift floor Jack to get the truck in the air and what would spinning the rear wheels do?
7 inch lift and there was no drivetrain modification??? that seems awful risky....

it would allow you to spin the driveshaft and listen to see if the noise is coming from the transmission, or the rear end, or transfer case, or wherever... you cant spin the driveshaft with the wheels on the ground AND be under it