Help me find a suspension creak/squeak! - Page 2 - Ford Mustang Forum
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post #16 of 23 (permalink) Old 11-19-2015 Thread Starter
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Well, here's the deal...still no solution, though I'm pretty sure it is the rear springs/insulators. There's really nothing left. Every bit and part and been removed and re-lubed. I removed everything from the trunk. A silicone sprayed all the exhaust hangars and on the spring insulators themselves. I've wrangled the exhaust in every direction to see if made a noise. I've pushed, pulled, poked and prodded everything I can find under there. I can't reproduce the sound by pushing down on the car, but every once in a while I can get a very small similar sound if I push up from underneath, but still nothing to really isolate the noise. The noise is most certainly only occurring when the rear axle moves with a jolt or extreme ranges. I haven't removed the insulators to look at them, but I figure I'll just order new ones and be done, then I'll really know. I think it is the top insulators and maybe just the right top one, based on how the sound seems like it comes from the rear package tray/behind the rear seat.


2008 Bullitt|Roush M90 w/2.57 pulley & CAI; 90mm MAF; Steeda-UCA, LCAs, Ultralites, links, mounts; MM CC plates; Bilsteins; GT500 FCAs; Brembos; Roush shifter; GT500KR axle back; etc
1969 Coupe Restomod-never complete!
2008 Power Wheels Bullitt Clone
Mustangs from the past: 66 coupe, 69 Coupe, 69 Grande, 2001 Bullitt, 2011 V6

Last edited by rangerdoc; 11-19-2015 at 03:42 PM.
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i have read somewhere that the rubber bumbers for the trunk cover can squeak.... those bumpers are in the trunk opening near the rear glass, that could make it sound like the noise come from the package tray. Try a bit of lube on those bumpers. Long shot, but it may be that simple.


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Check clearance between over axle pipes and panhard brace.


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Had a chirping sound in right rear for ever. greased rubbed and shagged everything I could.
had it in the dealership. finally ended up being the shocks. try switching side to side. worked for Me. hasn't chirped since
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post #20 of 23 (permalink) Old 11-29-2015 Thread Starter
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Well, I finally figured it out. The squeak noise is from where the rear sway bar connects at the rear shock area. I removed the sway bar and tried re-lubing everything but no change. If I don't tighten it much I don't get a squeak but at the specified torque of 52lbs (which I believe is correct) I get the squeak. I don't remember if that part came with the sway bar or if it is a stock part. Is it possible for those bushings to just go bad? I don't see a way to fix it without replacing the part. I emailed Steeda to see if that part came with the sway bar since I don't remember. I can't find that mount piece on their website as a stand alone part.

2008 Bullitt|Roush M90 w/2.57 pulley & CAI; 90mm MAF; Steeda-UCA, LCAs, Ultralites, links, mounts; MM CC plates; Bilsteins; GT500 FCAs; Brembos; Roush shifter; GT500KR axle back; etc
1969 Coupe Restomod-never complete!
2008 Power Wheels Bullitt Clone
Mustangs from the past: 66 coupe, 69 Coupe, 69 Grande, 2001 Bullitt, 2011 V6
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post #21 of 23 (permalink) Old 11-29-2015 Thread Starter
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I found a couple pictures on the AM site. The circled areas is where the squeak is coming from and it does look like a Steeda part.
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2008 Bullitt|Roush M90 w/2.57 pulley & CAI; 90mm MAF; Steeda-UCA, LCAs, Ultralites, links, mounts; MM CC plates; Bilsteins; GT500 FCAs; Brembos; Roush shifter; GT500KR axle back; etc
1969 Coupe Restomod-never complete!
2008 Power Wheels Bullitt Clone
Mustangs from the past: 66 coupe, 69 Coupe, 69 Grande, 2001 Bullitt, 2011 V6
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post #22 of 23 (permalink) Old 12-21-2015 Thread Starter
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Just thought I'd close out this thread. Steeda sent me new bushings and the noise is now gone. I lubed the bushing prior to installing them in the bracket. They came pre-assembled last time. Seems like a zerk fitting and some grooves in the bushing would be a permanent solution.

2008 Bullitt|Roush M90 w/2.57 pulley & CAI; 90mm MAF; Steeda-UCA, LCAs, Ultralites, links, mounts; MM CC plates; Bilsteins; GT500 FCAs; Brembos; Roush shifter; GT500KR axle back; etc
1969 Coupe Restomod-never complete!
2008 Power Wheels Bullitt Clone
Mustangs from the past: 66 coupe, 69 Coupe, 69 Grande, 2001 Bullitt, 2011 V6
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THANK YOU for coming back to post the resolution. Most guys don't. Which is so frustrating to someone else who has the same problem.

For a suspension clunk/rattle/squeak my first step when a customer arrives (after checking for the obvious things) is to disconnect the swaybar ends and either tie it up or pull it off completely and go for a test drive. It's the easiest part to remove - usually six bolts or less - and frequently the source of such noises.

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