Need help diagnosing clunk/rattle
Thread Starter
Launching!
Joined: Mar 2010
Posts: 289
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From: Earth
Need help diagnosing clunk/rattle Installed SFC's, LCA's, PHB, and sway bars. Didn't realize they needed to be preloaded until a friend told me. Went back and preloaded them after about 1000 miles of driving. Everything seemed fine. I have since put a few thousand miles on the car and notice a clunk/rattle coming from the back of the car when going down bumpy roads. I've checked for loose bolts on the parts I've installed and they all seem fine to me. All bushings have been greased. I can't seem to isolate the problem. Any ideas as to what might be causing this? Is this a normal occurrence after switching to poly bushings?
Launching!
Joined: Sep 2009
Posts: 236
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I went to all poly, and the ride is harder, and little more bump noise, but I dont hear clunks or anything out of the ordinary. clunks can even occur if you have any garbage in the trunk moving around. I would double check everything for tightness. If you touched any part of the exhaust the exhaust could be banging. Otherwise check the shocks even. Try bouncing the car up and down to get it to make noise. other than that, check sway bar and links, and sway bar bushings. Get under there and basically wiggle everything around and see if there is play in anything. It has to be one of the above... panhard rod and trailing arms are the only other things back there.
anytime you remove the factory rubber for poly or solid mounts, youll pick up noise. after I did my LCA reloc brackets, eibach drop, and panhard bar, I picked up a clunk in the rear, usually when backing out of my driveway and hitting the drainage ditch (load change/reversal) I think I have it narrowed down to the one solid bushing on my panhard bar. Its just the nature of the parts. My friend put solid lower control arms on his 07 gt, the first time I took a ride in it I thought the rear end was going to fall out of the car thats how loud they were, you could litteraly hear every bump in the road. If you know everything is tight, I wouldnt worry about it.
Thread Starter
Launching!
Joined: Mar 2010
Posts: 289
Likes: 0
From: Earth
I went to all poly, and the ride is harder, and little more bump noise, but I dont hear clunks or anything out of the ordinary. clunks can even occur if you have any garbage in the trunk moving around. I would double check everything for tightness. If you touched any part of the exhaust the exhaust could be banging. Otherwise check the shocks even. Try bouncing the car up and down to get it to make noise. other than that, check sway bar and links, and sway bar bushings. Get under there and basically wiggle everything around and see if there is play in anything. It has to be one of the above... panhard rod and trailing arms are the only other things back there.
anytime you remove the factory rubber for poly or solid mounts, youll pick up noise. after I did my LCA reloc brackets, eibach drop, and panhard bar, I picked up a clunk in the rear, usually when backing out of my driveway and hitting the drainage ditch (load change/reversal) I think I have it narrowed down to the one solid bushing on my panhard bar. Its just the nature of the parts. My friend put solid lower control arms on his 07 gt, the first time I took a ride in it I thought the rear end was going to fall out of the car thats how loud they were, you could litteraly hear every bump in the road. If you know everything is tight, I wouldnt worry about it.
Anyone have the torque specs on the LCAs, PHB, and sway bars? I misplaced the instructions UMI sent with them.
i have all the same aftermarket suspension as you. sfcs,lcas,reloc brackets,panhard, and sways. and have none of this extra noise everyone is talking about. maybe check your hardware for your shocks. there has to be something loose down there. do you have access to a drive on lift? that would be one of the easiest ways to check. check all your exhaust as well for excess play or rubbing
