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Originally Posted by wrong83
There's 77,000 miles on it, is it normally to hear different whine tones and such from it the rear differential. If I give it gas and then let off of it and it cruises for several seconds it sometimes goes away even if I'm cruising at 20 mph.
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the back lash in the gears becomes greater as they wear and the surfaces get damaged if you run low or out of oil. the gears are biased in one direction when accelerating and the opposite when de-accelerating which cause different noises.