manual transmission whine

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07-26-2009, 12:41 AM

simonfoord

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manual transmission whine

My 92 f350 diesel manual transmission has a whine. I recently replaced the oil with ATF as specified. Has anyone used gear oil instead with good results and is it OK. I am thinking of trying it - maybe quieter?
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07-26-2009, 01:28 PM

nat13_3

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I've heard a lot of people running a thicker gear oil to quieten it down with no ill effects but I'm not sure what weight.

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07-26-2009, 11:16 PM

wkett

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I have the Mazda 5 speed in my truck. I changed the ATF and put in 5w-30 with a quart of Slick50. It shifts better. I think the only way you could put gear oil it would have to be synthetic.

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