Loud clunk from rear around hard right turns

'98 v6 with a 1.5"ish super spring lift. Sitting on Bilstein 5100's on all four corners. The whole suspension setup is less than a year old, maybe 10k miles on it.

I drive a lot of windy, hilly roads very frequently and when I go around a hard right turn with any bumps in it I hear a loud, sharpish thunk from the back rear end. Something tells me the left suspension has something going on but nothing looks out of the ordinary.

What can I check to see if there's anything wrong?

Thanks!

 

First thing I'd do, is check the u-bolt nuts for titeness. Then the shackles.

 

What can you check? Everything. Do that first then post back.

 

Very helpful. Thanks.

I'll check the shackles and u-bolts.

 

Just being honest.
Like "I hear a hissing sound at my back tire and it is going flat. What could the problem be?" kind of problem Many people post problems without ever investigating the problem.

Hey I have real issue that I am having for you. My RPM's occasionally drop around 1750 rpms no matter what gear or speed. No telling sounds or check engine lights. What do you think it is? I figured it out by doing several tests.