1999 WJ Whining Noise when 70+
10-04-2010, 06:44 PM
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Year: 1999
Model: Grand Cherokee
Engine: 4.7L V8
1999 WJ Whining Noise when 70+
I have a high pitched whining noise when I'm driving 70+ but it goes away when I let off the gas. I thought it had to do with the A/C system but I turned it off and it didn't go away. Any ideas what this might be? I have to blast the radio just to drown out the whine. 70 seems like the magic speed where it starts.
10-10-2010, 04:14 PM
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Join Date: Oct 2010
Location: Valrico, FL
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Year: 1999
Model: Grand Cherokee
Engine: 4.7L HO
I had this same problem and just fixed it. I found a technical bulletin from Jeep addressing this. They redesigned the front drive shaft to get rid of the cv joint. They also made a rear drive shaft with a damper on it that rides aft of the t-case. I complied with the two TSB's linked below and now the driveline is nice and quiet at all speed ranges. Hope it helps!
http://www.wjjeeps.com/tsb/tsb_wj_030500.pdf
http://www.wjjeeps.com/tsb/tsb_wj_0300302a.pdf
http://www.wjjeeps.com/tsb/tsb_wj_030500.pdf
http://www.wjjeeps.com/tsb/tsb_wj_0300302a.pdf
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