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Got Clunk? Fix The Clunk From The Rear Of Your 07-09

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#1 OFFLINE   54First


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Posted 24 June 2012 - 10:10 AM

Nobody's mentioned this in a long time and there seems to be a second generation of 07-09 modders appearing.

The two most likely clunks from the rear of the car are driveline lash and UCAs. This fix addresses the UCAs. If you installed a urethane bushed UCA from the aftermarket and used the factory front UCA bracket, you're guaranteed a clunk. All the UCAs, factory and aftermarket, use a 14mm bolt in the front. Ford, in their infinite wisdom, put a 16mm hole in their bracket. There are two fixes. The best is to use the fabricated bracket from your UCA vendor. Second, Steeda (555-4110 - $9.45 at Summit) and UMI (1058 - $7.99 from UMI) make a stepped spacer that reduces the factory hole to 14mm. Needless to mention, proper torque (129 lb/ft) is also a must.


Edited by 54First, 24 June 2012 - 10:11 AM.

#2 OFFLINE   jnf


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Posted 08 July 2012 - 07:27 AM

I found my "clunks" to be coming from a bad spherical bearing in he LCA. Drove me crazy for 3 weeks until I got back under there with the suspension loaded and was able to move the LCA with my hand.
Couldn't agree with you more about replacing the UCA bracket while changing the UCA.
The aftermarket ones are much "beefier" than the stock one.
And yes, torque specs are a must as well as applying grease at every step as specified by the manufacturer.

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