Suspension 2006 GT Guidance please, retightening rear suspension

Good Day Everyone,

I am in need of some guidance. Aren't we all?
I would appreciate some direction as to not make this issue worse and possibly correct it.

Long story short, I had shop put in UCA, LCA's and panhard bar. All non-adjustable BMR.
And after about a month, when I braked hard I would hear a clunk. Hard to tell from where, and shop couldn't find anything.

Now I get a clunk/thud when putting car in reverse. Sometimes when braking hard. Steering feels restrictive.
And make a clunk when I let food off brake putting into park. Much more noticeable today. And when I turned left into a spot.
Sounds for sure coming from back seat area.

I am thinking that they did not tighten the suspension with it on the ground or loaded.
My plan was to grab some dollys and see if I can crawl under there to loosen all the bolts and then torque down.

Is there anything else I should try to check? And any recomendations on how to swear less when doing this?


Car is 2006 GT A4, CAI, Tuner, Subframe connectors, UCA, LCA, panhard rod bar, 3:73 gears.

Thank you much!

Thanks for the reply. Where should I place the 4 jack stand? What would be best?

I bought a protractor to check pinion angle as I read that could cause my issue. As well as needing to torque it back down.

Yes factory mount, that sounds like my issue thank you! I ordered anti clunking washers. Correct me if I am wrong, but those will connect the UCA to the factory mount?

I am going to order a new bolt for that section on the other bolt that connects to rear end.

Thank you