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whine at 55mph

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Old Nov 30, 2006 | 10:32 PM
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Revelation Z28's Avatar
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Default whine at 55mph

i havent had any noise out of the rear whatsoever with these 4.10's, but when im on the gas in 5th or 6th i get a slight whine on the drive side of the gear. it never did it before, but i read 4.10's smake some noise at thoes speeds. i get no other problems, or clunks, or anything.

the gears wore in perfectly after 500 miles..

the only thing i would think hurt them is a little wheelhop from spinning 2nd through water alot.. but as soon as i feel it i put the clutch in.

so is it just normal whine?
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Old Dec 1, 2006 | 07:19 AM
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i have it too, its the set up backlash, should be between 0.008 and 0.010 I added some friction modifier (GM posi additive) and they quieted down a little but didnt go away. I am using Redline synthetic oil if that makes any difference. I know they seemed louder with valvoline synthetic but not by much.
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Old Dec 1, 2006 | 12:26 PM
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yea i was thinking about the backlash being unset again after driving it for awhile. they were set at .008.

Originally Posted by alamantia
i have it too, its the set up backlash, should be between 0.008 and 0.010 I added some friction modifier (GM posi additive) and they quieted down a little but didnt go away. I am using Redline synthetic oil if that makes any difference. I know they seemed louder with valvoline synthetic but not by much.
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