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Will Heavy Oil Reduce a bit of Gear Whine?

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Old 01-07-2006, 12:36 PM
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Default Will Heavy Oil Reduce a bit of Gear Whine?
I have new gears and they whine a bit, buy only 60-70mph, light throttle. I could live with it, but it is annoying since that's how I'm usually driving. Someone said heavier oil like 80W-140 would make it quieter. Right now I have the GM recomended stuff which is 75W-80.

Anyone successful with heavier oil and a quieter Gear? Thanks!!
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Old 01-07-2006, 01:47 PM
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i am in the same boat and was wondering the same.
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Old 01-08-2006, 05:36 PM
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i had 75w90 in my 12 bolt and it whined then i swiched to 85w140 and it made it a bit more quiet. but im still breaking mine in. just my 2 cents
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