new control arms and springs now knock from rear??? - MustangForums.com



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Old 05-18-2012, 01:55 PM   #1
robbiegtp
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Default new control arms and springs now knock from rear???

I just installed upper and lower tubular control arms in the rear and installed lowering springs now when im taking off or when giving it gas i get a knock noise from the rear. I checked all my bolts everything is tight. What could be causing this? Its a 94 mustang. thanks for the help
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Old 05-18-2012, 02:16 PM   #2
Jeffk
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You might get more responses if you post in the generation specific section. I wish I could help you figure it out...

How much did you lower it? Could it be the driveshaft making contact with the floor pan?
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Old 05-18-2012, 06:59 PM   #3
V6Stang93
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Is it kind of a creaking sound? Because I have a Knocking/creaking noise that is coming from my rear and I believe its from my LCA's.
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Old 05-18-2012, 08:57 PM   #4
robbiegtp
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ya more of a knock when stopping and accelorating. But on turns sometimes its creaking. Anyway to get rid of the noise? Control arms are brand new
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Old 05-18-2012, 11:54 PM   #5
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I dunno, I literally just installed mine 5 days ago, haven't figured any solution out yet.
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Old 05-19-2012, 12:15 AM   #6
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Quote:
Originally Posted by robbiegtp View Post
I just installed upper and lower tubular control arms in the rear and installed lowering springs now when im taking off or when giving it gas i get a knock noise from the rear. I checked all my bolts everything is tight. What could be causing this? Its a 94 mustang. thanks for the help
If the control arms have Heim joints they should break in and stop creaking in a short time.
If you have poly bushings, the noise can be permanent if the bushings are not grease-able. Some companies ship a special silicone installation grease that counters these noises. If they are installed dry they can make quite a bit of noise and it may not go away.
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Old 05-20-2012, 11:27 AM   #7
robbiegtp
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ya i lubed the joints they got quieter but then came back after some driving. The noise is really annoying. Do all the aftermarket poly arms make noise? I might have to buy new ones
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