Annoying whistling
#17
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Join Date: Dec 2008
Location: Washington State
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Year: 1996
Model: Cherokee
Engine: 4.0L HO
Even if your diff has fluid that doesn't mean its not going to howl or make a high pitch noise. My buddy's XJ does this same thing even though he has fluid in it. Most likely its a bad bearing in the rear end. It will get worse and eventually leave you stranded unless fixed.
Or it could be something else
Or it could be something else
#23
CF Veteran
That noise sounds familiar so here's my .02. Pull the fuse on your stereo, if it goes away, you have a ground loop that is allowing electrical interference from your alternator. When you give it some gas, the speakers, which are low-voltage devices, are picking up the AC flux and making that strange hum at low rpm and whistle at high. This happens a lot with people who have amps or capacitors installed as part of their stereo system because the ground is usually strapped to a convenient point on the chassis, which your alternator is also directly grounded to. You can either redo your wiring to connect the ground to the stock electrical systems or get a ground loop isolator from Radio Shack, which just installs inline with your stereo plugs: http://www.radioshack.com/pwr/produc...-Isolator.html
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