Thump in rear end - CrossfireForum - The Chrysler Crossfire and SRT6 Resource


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Old 02-23-2011, 11:36 AM
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Default Thump in rear end

I have recently noticed a loud thump coming from the rear end when
going over bumps, speed bump, etc. It only sounds like passenger rear.
I am going to bring in to dealer, still under extended warranty.
Just looking for input as what it coud be. I checked the exhaust tips, they are holding tight.
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Old 02-23-2011, 12:53 PM
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Default Re: Thump in rear end

check your lugnuts. That was what I experienced in Nov, and 3 out of the four wheels were loose. Thumping sound mainly had me checking the tips too, and that was tight. An hour later the thought of loose lugnuts popped into my mind and sure enough, that's what it was.
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Old 02-23-2011, 02:11 PM
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Default Re: Thump in rear end

I will check. That is scary. The thought crossed my mind, but hadn't checked.
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Old 02-23-2011, 04:26 PM
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Default Re: Thump in rear end

I was more than apprehensive about clicking on this thread.


You may want to look at your sway bar mounts as well.
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Old 02-23-2011, 04:29 PM
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Default Re: Thump in rear end

I figured I'd get some attention..
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Old 02-23-2011, 06:42 PM
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Default Re: Thump in rear end

The Rear Shocks will knock pretty hard if they are not very tight. I had this after shifting to Koni's.
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Old 02-24-2011, 09:39 AM
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Default Re: Thump in rear end

I checked rear lugs and sway bar. All was tight. Will look at shocks tonight.
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Old 02-24-2011, 01:54 PM
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Default Re: Thump in rear end

good. You're doing this in a logical fashion. Check to ensure the jack and pump is battened down? There's not alot else back there.
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Old 02-24-2011, 04:35 PM
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Default Re: Thump in rear end

I also have a tire patch kit and tools. Checked everything. Actually I took everything out of truck.
I have set up an appointment at dealership tomorrow. I will let everyone know what they don't find!!!
Did talk to my service guy. He is the only one that has done service on my car.
Since they don't see many SRT6's, he didn't have a clue what it could be. He thought
maybe a shock, but we'll wait and see.

Last edited by roncosrt6; 02-24-2011 at 04:40 PM.
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Old 02-24-2011, 06:42 PM
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Default Re: Thump in rear end

Quote:
Originally Posted by roncosrt6
I also have a tire patch kit and tools. Checked everything. Actually I took everything out of truck.
I have set up an appointment at dealership tomorrow. I will let everyone know what they don't find!!!
Did talk to my service guy. He is the only one that has done service on my car.
Since they don't see many SRT6's, he didn't have a clue what it could be. He thought
maybe a shock, but we'll wait and see.
yeah, it's a shock-real shock they didn't have a clue what could possibly be wrong with a Cross.
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Old 02-25-2011, 10:51 PM
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Default Re: Thump in rear end

Update --- Dealer had car all day. They were able to re-create the thump,
but don't know what the cause.
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Old 02-25-2011, 11:01 PM
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Default Re: Thump in rear end

I dunno.

Stop going over bumps...problem solved.
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Old 02-26-2011, 07:56 AM
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Default Re: Thump in rear end

if you can recreate it, then you should be able to fix it... Good luck with it...
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Old 02-26-2011, 10:41 AM
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Default Re: Thump in rear end

They have been trying to get enough downward force on the rear end
so the can localize. They had a bunch of workers pushing down
on the car. I told him good luck. Here we go.
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Old 02-26-2011, 01:08 PM
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Default Re: Thump in rear end

well, have they tried a side to side motion? If it is up and down, then shock, shock tower up high...needs to have a look.
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Old 02-28-2011, 11:34 AM
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Default Re: Thump in rear end

It definitely happens on up and down motion. We will them today for update!
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Old 02-28-2011, 12:03 PM
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Default Re: Thump in rear end

Loose exhaust hanger at the rear of the resonator?
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Old 02-28-2011, 05:39 PM
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Default Re: Thump in rear end

Dinasrt, I will have dealer check. I talked to the dealer today. Still haven't found anything. They are starting to dismantle.
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Old 03-01-2011, 01:37 AM
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Default Re: Thump in rear end

Quote:
Originally Posted by roncosrt6
Dinasrt, I will have dealer check. I talked to the dealer today. Still haven't found anything. They are starting to dismantle.
My car only seen 2 dealerships and one vandalized my car the first visit. The 2nd ordered me a hood shock under warranty and only had the car 5 mins to install. If your under warranty then take your car to Andrew at Atwood European in Phx. He does warranty work as I had the Maxcare, and you will see he works on bentleys, MB, Ferrari's, etc. The only place I trusted. Dealerships have no clue on the six.
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Old 03-02-2011, 08:25 AM
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Default Re: Thump in rear end

Cruzin, I will give them till the end of the week.
They are changing out the rear shocks. So you are right,
they are using shotgun approach to fix.
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