02-04-2019, 04:36 PM
(This post was last modified: 02-04-2019, 04:38 PM by Reckless Rat.)
Perhaps, given that you say the rear axle has been rebuilt that perhaps the torque tube mount hasn't been correctly set up after reassembly. When you say you can feel & hear the knock, is it coming from under the floor behind the seats or from the bulkhead? The only other thing I'm thinking about is the front crossmember/radius arms ball joint, the rivets mounting the ball to the chassis can become loose. One last possibility is a road spring knocking on the underneath of the body - you'll be able to see if this is happening if you jack the car up, remove a rear wheel and look to see whether the leaf clamp has been contacting the tub - there'll be a mark. (ask me how I know that - anyone got a pair of Nobbies they don't want?)