I've got a 9in rear end out of a 1977 Thunderbird that I'm using in my 52 truck. When up on the lift the driver side wheel spins nice and easy whether turning the wheel or the yolk. The passenger side does not spin when turning the yoke and when turning the tire it is very stiff. But when I turn the tire the yoke spins. I've rebuilt both of the brake systems and the parking brake is disengaged. I haven't taken the pumpkin apart yet to see if there is anything obvious inside of it, and I'm basing the non posi assumption off of the tag affixed to the rear end. Is one side being tougher to spin than the other normal for a non posi rear end? Or is there something possibly wrong with the rear end?