GT Performance Mods 2005+ Mustang GT Performance and Technical Information

Upper control arm squeak!

Old Mar 7, 2025 | 07:15 PM
  #1  
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From: Douglassville, PA
Upper control arm squeak!

I had the rear upper control arm replaced recently from the stock one to a BMR non adjustable one. The past month or so it developed a really annoying squeaking whenever the car moves or goes over bumps, brought it back to Ford who replaced it and said it's normal with the bushings and the cold temperatures.. I can hear it from under the back seats when I drive and it's irritating! The stock one was quiet but was shot, the car has 190k on it. Has anyone else have this kind of problem with an UCA squeak and how did they resolve it??
Thanks!

Last edited by OneCoolGT; Mar 7, 2025 at 10:51 PM.
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Old Mar 7, 2025 | 08:41 PM
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For Some Reference Here is The Install Vid!

Did They at Least Try & Regrease Fitting?? I Would Check To See If Fitting Was Installed Correctly Just Because as Well! Improper Torque on Front Mounting Bolt May Cause Squeaking as Well. Spraying Some White Grease or Silcone Spray on Area Of Bracket Where it Meets Red Bushing Outer Both Sides Could Confirm if Noise is Coming From That Area!

KC


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Old Mar 8, 2025 | 05:41 AM
  #3  
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KC, thanks for posting that video...easy to understand instructions on that one...
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Old Mar 8, 2025 | 11:03 AM
  #4  
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That's what you get with polly bushings. I always use rubber bushings for the rear UCA. Maybe grease them?
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Old Mar 8, 2025 | 12:46 PM
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Thanks for the replies, I'm gonna recheck the bolt and see if they torqued it down properly. The UCA has a grease fill fitting on it, they said it was full so I'm hoping it's just the colder temps that is making it squeak..
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Old Mar 8, 2025 | 01:38 PM
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Back in the 90's I Was a Jeep Parts Manager & We Did a Lot of Custom Wranglers With Lift Kits! We Learned Quick This Was The Go To on The Bushings For Smoothness! It Took Some Thought Before I Recalled This Info As My Noodle Has a Huge But Hard To Access Database!

Amazon Amazon


I Remember The First 4 Cyl Jeep We Tried To Put a 3 Inch Lift Kit On After Doing Some 6 Cylinder Ones Which Had a Heavier Engine. That Four Cylinder Would Not Budge on The Suspension Till We Took The Leaf Spring Bushings Out & Coated With This Miracle Goo! So Yes Bushings Can Be Sticky!

KC

One of The Reviews From Amazon!
<i>5.0 out of 5 stars</i> The Best grease 5.0 out of 5 stars The Best grease

Reviewed in the United States on December 24, 2022
Verified Purchase Verified Purchase
This grease solved a huge problem on my corvette suspension. It eliminated a squeaky rear suspension which had been an issue for years. Tried many different products, none worked, this grease DOES work. Highly recommend.
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Old Mar 8, 2025 | 08:52 PM
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Yep that can be par for the course with urethane bushings unfortunately. I had some sequeaking problems with the Energy Suspension grease (got the little tubes with the various parts), thought I might need more grease, but couldn't find whole cans of it for a grease gun. So I went with Valvoline full synthetic since they have it at parts stores. It's worked pretty well for me over the last 15 years.

Now you want to talk squeaks --- I have BMR front control arms with Delrin bushings -- they say they're self lubricating, but they sounded like a rusty door any time the suspension flexed -- over a bump, around a curve, heck even when you'd get in the car! I tried to ride it out to see if they'd self lubricate and it'd go away but after a month I couldn't take it anymore. I used the Valvoline in a grease gun again (being very easy on the pressure, didn't know if overdoing it would crack the Delrin). Been quiet ever since.

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Old Mar 9, 2025 | 06:29 PM
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I have the polyurethane bushings in a lot of other parts and they don't squeak at all, makes me wonder if the bushing is bad or loose/overtight? If I do grease it up how hard or easy is it to do? Can I just undo the bolt under the seat and drop it down or does it have to come out of the car?
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Old Mar 9, 2025 | 10:33 PM
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Here is Some Shop Manual Pdf's As an FYI!

Of Note, Ford Says Bolts are One Use! So Dealer Should Have Installed New Hardware! Make Sure They Did! Would Be Listed on repair Order Unless You Supplied! And Check Out The High Torque Value on Arm Bracket!

KC
Attached Files
File Type: pdf
2006 Mustang Torque Specs.pdf (108.1 KB, 95 views)
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Old Mar 9, 2025 | 10:50 PM
  #10  
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Thanks for that info! Why is the bolt a one time use? Not sure if they replaced it or not, I have to find that out.. this noise is driving me nuts, seems to be getting more pronounced the more I drive the car!
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Old Mar 10, 2025 | 12:01 AM
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https://rts.i-car.com/crn-1550.html

One-Time-Use Parts And Fasteners

What is a one-time-use part, and how do you determine if a fastener, clip, or part can be reused? These are questions that we are confronted with in the collision industry quite a lot. The other big question is "Where do I find this information?"

As the Repairability Technical Support (RTS) team researches OEMs for one-time-use fastener/part information, we are putting together a series of articles on how and where to locate this information for specific OEMs.

One-time-use fasteners/parts are specific items that cannot be reused after they have been loosened or removed. Types of one-time-use fasteners/parts include certain bolts, clips, trim, etc. They can even include stationary glass.

Most OEMs have at least one example of a one-time-use fastener/part. The reason it is only good for one use can vary. For example, torque-to-yield bolts are designed to stretch during the torquing process. These fasteners cannot be reused because of the excess amount of stress that was caused during installation. Some fasteners may have to be replaced due to a factory applied coating that prevents corrosion. In other cases, a part or fastener, such as a rivet, is simply impossible to remove without damaging it.

One-time-use parts and fasteners that appear to be uncompromised may look good but should not be reused. In addition, if new fasteners are supplied with a replacement part...use them.

Following OEM procedures, including the identification and use of one-time-use fasteners/parts, is important in order to help ensure a complete, safe, and quality repair.
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Old Mar 10, 2025 | 08:42 AM
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OP, quick question...did you have the Upper Control Arm AND the Mount replaced or just the Upper Control Arm? Did you keep the stock Mount?
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Old Mar 10, 2025 | 09:35 AM
  #13  
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UPDATED DUE TO ONE ERROR!

As Per Mad Gt Request PM Here are Some Oem Part Numbers!

Oem Control Arm

4 Upper Arm 6r3z-5500-a

https://www.fordpartsgiant.com/parts...tra2=&filter=()

As Per Pdf Bolts Number 1-6

1 https://www.fordpartsgiant.com/parts...8795-s439.html
2 https://www.fordpartsgiant.com/parts...0215-s440.html
3 https://www.fordpartsgiant.com/parts...0443-s439.html
4 See above
5 https://www.fordpartsgiant.com/parts...1075-s439.html
6 https://www.fordpartsgiant.com/parts...0947-s439.html

FORD Does Not Show Bolt Used For Attaching Aftermarket Arm To Factory Bracket.

Ford Hardware Numbers are Goofy. They Show Partial Part Numbers in Shop Manual and Also Can Update To Entire Different part Number. Also Be Advised Sometimes You Only Need One Bolt and End Up Buying a Package Quantity.

KC

I Had To Go to 2010 Shop Manual To Get Updated Partial Numbers. Same Setup!
Attached Files
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Old Mar 10, 2025 | 09:53 AM
  #14  
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KC!!! Spot on...thx, you make life easy when it comes to finding these stuff....
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Old Mar 10, 2025 | 09:55 AM
  #15  
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Originally Posted by MadGT
KC!!! Spot on...thx, you make life easy when it comes to finding these stuff....
Hang Tight I Have One Wrong Bolt I Am Cross Checking!

KC
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Old Mar 10, 2025 | 09:59 AM
  #16  
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Originally Posted by 05stangkc
As Per Mad Gt Request PM Here are Some Oem Part Numbers!

Oem Control Arm

4 Upper Arm 6r3z-5500-a

https://www.fordpartsgiant.com/parts...tra2=&filter=()

As Per Pdf Bolts Number 1-6

1 https://www.fordpartsgiant.com/parts...8795-s439.html
2 https://www.fordpartsgiant.com/parts...0215-s440.html
3 https://www.fordpartsgiant.com/parts...0443-s439.html
4 See above
5 https://www.fordpartsgiant.com/parts...8795-s439.html
6 https://www.fordpartsgiant.com/parts...0947-s439.html

Not Does Not Show Bolt Used For Attaching Aftermarket Arm To Factory Bracket.

Ford Hardware Numbers are Goofy. They Show Partial Pat Numbers in Shop Manual and Also Can Update To Entire Different part Number. Also Be Advised Sometime You Only Need One Bolt and End Up Buying a Package Quantity.

KC
KC,

#1 and #5 are the same?
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Old Mar 10, 2025 | 10:07 AM
  #17  
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Exactly, That is What I Was Fixing!

See Updated Corrected Post 13!

You Were Just Too Durn Fast!

LMK, if You Need Anything Else!

KC
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Old Mar 10, 2025 | 10:23 AM
  #18  
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Here is Axle Bushing For an FYI!

https://www.fordpartsgiant.com/page_...keywords=5a638

KC
Attached Files
File Type: pdf
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Old Mar 10, 2025 | 10:24 AM
  #19  
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Ha! Ordering parts now...yeah, I am a "spring butt"...
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Old Mar 10, 2025 | 10:25 AM
  #20  
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Well,

It's Nice To Be Appreciated!

Thanks,

Kc
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