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Old 05-01-2014, 12:21 PM
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Squeaking / Chirping at high speeds

My dealer is having trouble diagnosing a squeaking noise coming from my 2012 Overland Summit 5.7 with approximately 60k miles.

Anytime above 50mph or so it will begin a chirping, squeaking, ect. that is wheel speed dependant. The noise stops when turning left but right worse when turning right. Goes away in the rain as well.

Under acceleration I can't really hear it but the engine noise may just be covering it up. It gets slightly worse while coasting but is very noticeable under normal cruising as well. Applying the brakes has no effect on the squeak (including parking brake)

The transfer case was recently replaced for a failed clutch pack, but the squeak/chirp didn't appear until about 3500 miles later.

The dealer has replaced the rear drive shaft so far but to no avail.

Being a gearhead my gut tells me this is a bearing related squeak/chirp. Since it's wheel speed dependant (not engine speed dependent), dianoses starts from the wheels in.

Wheel bearing, axle, front or rear diff?

I'm even maybe thinking the front drive shaft may need to be replaced, but would that be affected by the vehicle turning?

It sounds exactly like this:
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2012 Jeep Grand Cherokee Overland Summit 5.7L
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