360 Noticable "clunk' from rear of car

I had brought this up before... When I'm making a tight turn at parking lot speeds (<3mph I'm guessing) there is a clunk, clunk, clunk from the rear of the car. We put the car up an checked all the bushings and found nothing awry. The car has 27K miles on it. Is it possible it's because the ASR is engaged. I hadn't thought about it previously so I didn't have a chance to try switching off the ASR and trying a parking lot test.

The car is in for a fluids change and we (I know the indy well) cannot see anything out of the ordinary externally. The car shifts, runs, and handles fine. The Trans fluid (F1) was changed and the gear box fluid was changed last service less than 5K miles ago --all with the correct fluids recommended.

The rear tires are 325- 30 -19"
The car is not abused and driven with respect, but driven as a 360 should be driven.

I know this is tough diagnosing a problem over the internet, but still... thought I'd toss it to you experts.

 

Once again thanks to all you folks here. I checked the wheel bearings and all seems good.
Parking brake, probably not. I can have this issue after a long drive-- and I never smelled that distinct smell of a stuck brake.
Seems like the CV's are good. But we still have the car on the lift so I will check that one more time. This is what I was thinking it might be. But didn't want to speak it out loud $$$$

Randy: as mentioned above, while the car is still on the lift we will look for that washer. Thanks so much for effort in the posts.

Great community guys--- 2 thumbs up!

 

The motor mounts and trans mount have been changed out. But with that said, yes, after inspection further it seems the only play in anything is the sway bar drop links. I'm thinking on a tight turn that could be it. It's not much but there is a little wiggle.

Just came from the shop. No problems with the CV's. The washers are in place on the lower shock to A-arm.
Definately not the front fenders to wheels but we did raise up the front coil driver side (driver weight -- me about 200lbs) about 1/4".

 

Just a note about tires... I have 235-35 x19" front tires. The ones I just put on the car are noticeably not as "wide" or as "tall" as the ones I replaced (both are Michelin Super sport tires-- the new ones are all season). Now I've been in this car business for many many years and it seems only recently this has become a unreliable parameter when spec-ing tires.

The tires on the last two projects we did had significant variations in the actual physical size of two tires that were supposed to be the same size tire. The cross-section width seems to be the biggest offender-- and unfortunately the most critical measurement when setting things up on a car. Kind of frustrating since this formula for tires was established to do away with the varying sizes of the old system of the G-60x15" or L78 x 15". FWIW