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Old 02-10-2011, 06:42 PM
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shorod shorod is offline
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Re: Unwanted high pitched sound

Welcome, fellow Iowan!

My initial suspect would be either a rear pinion bearing or a rear wheel bearing. Rear wheel bearings are pretty common, rear pinion bearings not as much. You could try changing the rear differential fluid and see if that changes the sound. If so, then it's probably pinion bearing.

-Rod
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