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The rear sway bars have not been replaced. When you look at the driver side rear the tire is even looks like it not stright. I can see where the tire is scrubbing the inside where the i believe it the control arm mounts to the frame. When you look at the rear of the tahoe while its on level ground it leans to the L side. When i measure the height of the frame from the ground there is about 1 inch difference. Also measuring from center of front wheen to the center of rear wheel there is about 1 1/2 inches difference. Any other Ideas? I am taking it to a shop to have the frame checked to make sure its not bent.
Could deff. be the rear struts on this car but could also be that the alignment in the rear is way off causing the wheel that is supporting the most load when hitting a bump or pot hole to pull the car in the desired direction that that whell is angled toward. But if you are leaning towards replacing the rear struts do that first since it also requires a 4 wheel alignment then all the bases are covered. Otherwise if you try the alignment and that isn't it you will have to pay for a second alignment after the struts are replaced.
I can think of two things not easily seen that can cause a banging when hitting small bumps; The sway bar end links could be loose or broken. The rear shock bolts, the lower bolt that holds the shock onto the rear axle, I've seen that mounting hole down there get enlarged, allowing the shock bolt to move about when hitting small bumps, causing a banging sound. Check those two things out.
first of all, since you are using adjustable suspension you should make sure the spring is captive in the shock absorber. Lift the rear of the vehicle and support the car on the body, allowing the rear wheels to hang down. See if the spring can easily be moved. If it can. then likely the spring has sagged, or it is incorrect for the shock absorber.
If not, while you are there check that the top hat of the strut is tight by lifting the wheel and strut assembly by hand. If you get any movement in the top of the strut, there will be a loud noise while going over bumps.
Another area to check are the stabiliser arm/sway bar bushes.
Mounted to the body you will see a bar that goes left to right, connecting to the struts with small link arms.
Try to move this bar up and down against the body, paying attention to the rubber bushes where it meets the body. If there is movement in the bushes, there will be banging sounds when going over rough surfaces or bumps. Also check the small link arms for looseness or play.