Stock 17GT right rear creaking when loading/unloading side to side

[lkeltner]

17GT, 30k mi. stock suspension

I have a creaking noise that happens when the car loads and unloads left to right. The sound comes from the right rear.

It never happens if the car goes over a bump straight (like a neighborhood speed bump)

I also can't recreate it by pushing down directly on the right rear and bouncing the car as much as I can.

I'm going to be replacing IRS parts with KellTrac's S550 Mustang IRS Bushing Upgrade Kit, Level 1 (kelltrac.com) kit soon, and I figured I'd like to get this figured out and fixed at the same time.

Any ideas to help me pinpoint it?

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[jmorris47]

mine just started doing the same thing....and I mean just started. I will crawl under it this weekend. Please post if you figure it out.

 

[S550_GTCS]

Mine was the knuckle to toe-link bearing on the passenger rear. I would start there.
Ford part # M-5A460-M

 

[jmorris47]

Thank you.

 

[lkeltner]

That doesn't look too bad! and it looks like it's an upgrade in bearing type as well.

Do we need to grease these anywhere to keep them from squeaking? I've heard that can be an issue with delrin.

 

[jmorris47]

I finally found time to try and find the source of the squeaking and found this. Part number is JR3W-4A263-EA and I understand it is called Differential Carrier Mount. I guess it is supposed dampen vibration. Anyway, mine kinda flops around. Anyone have any experience with this thing? Does is interfere with installation of a differential bushing kit? I suspect it will have to go.

 

[lkeltner]

whoa, that's floppy! I'll check that out as well.

 

[jmorris47]

I am not sure if this is the cause of the noise, but I found passenger LCA bushing torn and the driver side differential starting to split at the 12 o'clock. The dealership is booked up until Oct 9th!!!

 

[lkeltner]

That doesn't look too bad! and it looks like it's an upgrade in bearing type as well.

Do we need to grease these anywhere to keep them from squeaking? I've heard that can be an issue with delrin.

nevermind on this, the instruction pdf says how to get it handled with loctite.

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