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When you say whine does it only occur under acceleration only? If so most likely the wheel hub assembly or some will say wheel bearing but on these vehicles it is complete hub assembly. If you turn or swerve one way then the other does it go away in one direction? If so another strong indication of hub wearing out. If not, and it is a really high whine with acceleration it is also possibly the transmission. I have heard of this complaint before, it's not a sign of failure just a noise that develops due to the pressure placed on bearing under a load. First change fluid and filter for tranny after a good flushing. Replace with high quality fluid and a bottle of transmission seal restore product. Go 1000 miles, change fluid again, if noise is still there turn up radio. Sorry but just a whine under acceleration isn't a lot to go on. But I'm willing to bet wheel hub. 9 out of ten front end whine complaints is wheel hub or bearing especially on a heavy 4x4 suv
Here are the common causes or rear end noises
Constant high pitched whine at all speeds: Pinion Bearings or Ring gear carrier bearings
Whine at steady speeds or whines on deceleration: Rear end gear set is worn and will need to be replaced.
Rumbling type of noises are caused by wheel bearings or a tire with a separated cord.
Before replacing any parts, the source of the whining needs to be isolated. You can use a car stethescope or a long screwdriver and carefully place the end on various areas at the front of the engine and listen for where the noise is the loudest. Another method is to remove the serpentine belt and rotate each pulley that is driven by the belt, listen for noise and feel for rough movement.
Look next to the blower. You can remove the panel under the passenger side. Go through the glove box and move it down out of the way to access the electrical connector. Then remove two bolts and the electrical connector.
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