2004 CS Left rear suspension Clunk

[SWFLHOMES]

I have never seen this topic on the forum. When I take off hard from a dead stop it feels like the left rear suspension moves like it is slightly behind the right. It does not feel like the axel or differential and never happens when I take off "normally". There is a slight clunk like something is loose. It is NOT the cardan/drive shaft. I replaced that already. Any thoughts?

[Loren]

A loose rear swaybar sounds like that too - so that would be the first thing I would check.

[wvicary]

Check the rear control arm bolts. Sometimes they don't get tightened correctly after a wheel alignment.

[SWFLHOMES]

Thanks! I'll let you know how I make out. Could I need a new link?

[wvicary]

Links do wear as any component can and the odd time can break.

[SWFLHOMES]

Ok, checked the rear and as many links, bushings and bolts as I could see. I went for another drive, hit the throttle hard from a dead stop and now I swear it could be the drive shaft. Since I had this replaced last year at the dealer, I will bring it back to them for an inspection. Could this happen twice?

[SWFLHOMES]

I went to the dealer Saturday (1 1/2 hours away!). I have interesting results. They said that the drive shaft had some play in it and they would replace it (under warranty). This supports when to use the dealership, I decided a year and 1/2 ago to have the dealer replace the shaft. They charged $650 for the shaft and 2 hours labor at $105/hr. I figured if I bought the shaft at the same price it would have taken me considerably longer to do the job AND they warrantied the part for 2 years and the labor was lifetime.

The downside, I still have the same clunk. The service tech said other than normal wear (at 92,000 miles) the suspension and mounts were all good. I definately have some sort of movement going on in the rear suspension. They said it could be inside the differential but I have no whine or any noises. If I ease into the throttle there is no clunk, if I throttle somewhat hard from a dead stop you hear it. If I am going 30mph and hit it so it goes into 2nd you can feel it. Something is twisting and hitting the under carriage but I can figure out what it is.

Do I take it to another dealer or is there something I can check?

[RFM]

Nothing loose inside the trunk, under the carpet, tools, control boxes or similar objects ? It's just an idea.

[SWFLHOMES]

No, nothing. There is nothing loose in trunk. It is definately something in the drive line or suspension when you give it any type of hard acceleration.

[RFM]

The most common issue, which made a clunk noise and hit the under tray, is the main drive shaft bearing. Curious for the outcome.