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whine noise when letting off gas...bevel gear? V70-XC70 2002

posted by  unggthat on  Sat Oct 12 19:37 CST 2013
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last visit: Thu Mar 6 10:37 CST 2014
[RELATED]

Hello all,

I'm new to owning these AWD Volvos--just got this 2002 V70 XC from my in-laws. Of course, I've been doing most of the maintenance on it for years already.

Anyways, when accelerating, everything sounds fine. However, as soon as I let up on the gas, a high-pitched whine is immediately present. It lowers in pitch when slowing down, until a full stop. Then restart the process. It is quite noticeable. Definitely coming from the front area somewhere. I first thought it might be a wheel bearing, but it just doesn't sounds like one the more I listen to it. The transmission was just rebuilt, and the rebuilder said everything with the tranny is fine. I've ordered fluid for the bevel gear. Is that likely to fix anything? Do I need a (gulp $$) new bevel gear? Should I just deal with it?

As far as I know, the AWD system works well. Of course, I'm not really sure if it does and haven't tested it.

Thoughts?

Thanks!

Nate








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    posted by  someone claiming to be on  Wed Dec 31 18:00 CST 1969 [RELATED]

    Try bumping the shifter to N and see if the noise goes away immediately. If it does, it could be a vacuum leak. The vacuum pressure is quite high when slowly decellerating.


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    posted by  someone claiming to be on  Wed Dec 31 18:00 CST 1969 [RELATED]

    I just replaced my wifes bevel gear ass. on a 2004 xc70, only whined when you were under a load, not coasting, I would check the pass side cv axle bearing.if you don't know there is a bearing in the axle mounted to the side of the block.
    --
    2001 v70 T5, 2001v70XC, 2002 XC70, 2004 XC70, 1988 740 turbo wagon



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