Rear end suspension clunk/creek - Forums at Modded Mustangs
 
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post #1 of 7 Old September 29th, 2014, 01:21 PM Thread Starter
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Rear end suspension clunk/creek

I'm trying to figure out what is causing this. I'm getting under the car today. It's not consistent, it does it on take off and sometimes when I come to a complete stop. It sounds like it was coming from the passenger rear, but yesterday it sounded like the driver rear.

I figured I'd just grease the poly bushings, and put a wrench on all the bolts.

Rear suspension consists of all bmr, lca, brackets, uca, bracket, and phb.

Idk what it could be? It used to clunk alittle on take off, but it's definitely gotten more noticable.

14 Mustang GT M6 - TVS, Kooks Full Exhaust, AED Tune
11.04 @ 130.1
621/557 @ 8.6psi
Previous Cars
09 Corvette Z06 - 11.7 @ 123.5 (stock)
13 Mustang GT Bolt Ons - 11.58 @ 122.13
03 Mustang GT Vortech - 11.98 @ 118.68
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post #2 of 7 Old September 29th, 2014, 01:38 PM
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Quote:
Originally Posted by Shaun13GT/CS View Post
I'm trying to figure out what is causing this. I'm getting under the car today. It's not consistent, it does it on take off and sometimes when I come to a complete stop. It sounds like it was coming from the passenger rear, but yesterday it sounded like the driver rear.

I figured I'd just grease the poly bushings, and put a wrench on all the bolts.

Rear suspension consists of all bmr, lca, brackets, uca, bracket, and phb.

Idk what it could be? It used to clunk alittle on take off, but it's definitely gotten more noticable.
The clunk on take off is mostly normal. It's the backlash in the rear gears. It is present on my car as it has been on every car I've driven to some extent. Some cars do a better job of isolating the noise to very low level but our cars do it from the factory. Firm things up and you hear it more often.

That would be my guess as to what the clunk is if all the bolts are still tight.

The squeaking can be just about anything though. My rear brake calipers squeak a little when you get in the car with the parking brake on. Damn C-Clip axles!



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post #3 of 7 Old September 29th, 2014, 02:08 PM Thread Starter
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Good point, I remember first time he did the 3.90s, he set up the back lash at 9.5, this time was 11.5. Just seems loud though. Once I get under it, and if everything looks okay, I'll be fine.

It's not squeaking, more of a creek, or a faint clunk. Sometimes louder then other times.

14 Mustang GT M6 - TVS, Kooks Full Exhaust, AED Tune
11.04 @ 130.1
621/557 @ 8.6psi
Previous Cars
09 Corvette Z06 - 11.7 @ 123.5 (stock)
13 Mustang GT Bolt Ons - 11.58 @ 122.13
03 Mustang GT Vortech - 11.98 @ 118.68
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post #4 of 7 Old September 29th, 2014, 03:31 PM
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My LCAs are poly bushing and creek like hell when it's cooler.
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post #5 of 7 Old September 29th, 2014, 04:45 PM Thread Starter
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All set, shouldn't even of posted lol. You know the phb, on the driver side were the long bolt goes through that nut with the tab? The tab was sticking out in the wrong position. That and a jam nut on the uca was loose. So which ever one it was is all set now, greased everything up and no more clunk. I hate stupid intermittent problems like that, glad it was an easy fix.

14 Mustang GT M6 - TVS, Kooks Full Exhaust, AED Tune
11.04 @ 130.1
621/557 @ 8.6psi
Previous Cars
09 Corvette Z06 - 11.7 @ 123.5 (stock)
13 Mustang GT Bolt Ons - 11.58 @ 122.13
03 Mustang GT Vortech - 11.98 @ 118.68
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post #6 of 7 Old October 1st, 2014, 10:08 PM
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I was having the same problem and I was about to post about this.

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post #7 of 7 Old January 31st, 2015, 09:47 PM
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Sorry to bring up this thread again, but this is a fairly common problem I take it? My 13 GT/CS has a squeak/creek every so often coming from drivers rear and just recently I have been hearing something similar coming from the passenger rear? I have a Ford Racing Boss H-Pipe exhaust and was thinking this may be the issue?

Additional info: I park with my E-Brake on and it is cold as balls in the northeast

2013 GT/CS - FRPP Short Throw Shifter, Boss H-Pipe, Roush Axleback, C&L CAI, Bama Tune, Whiteline MT-82 Insert, SR Braided Clutch Line & V2 Coilovers Line, Steeda X-Brace, Whiteline Double Adjustable Panhard Bar and LCAs, Hawk 5.0 pads, MMD Wheels
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