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Thread: Bell like sound when changing driving direction

  1. #1
    Join Date
    Aug 2017
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    Wayne,PA
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    740iL (E38 '01)

    Bell like sound when changing driving direction

    I start running out of major issues with my car, time to tackle the less important ones!

    Whenever I change driving direction (forward to reverse or the other way around), there is a small "bell" like sound coming somewhere around drive shaft or differential area, certainly from the back.
    Showed it to a mechanic he said it's not worth to fix it, not a real issue etc (he is somehow familiar with E38s but not too much).
    Do you guys agree? Any way I can fix it without a lift and breaking the bank?

    Thanks!

  2. #2
    Join Date
    Feb 2010
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    Hampshire UK
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    99 840ci Sport Indv
    The noise comes (usually) from the rear CV joint - it can be replaced, or more economically the grease can be replaced and the pre-load on the joint checked as described here:

    http://www.meeknet.co.uk/e38/e38_remove_propshaft.pdf
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


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  3. #3
    Join Date
    May 2008
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    Philsdelphia
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    1986 e24 635csi, 1999 Saab 93, 1992 Saab 9000 turb
    So its the ring gear/fly wheel vibraring when drive or reverse engage. I believe the problem is in the movement of the release bearing. Unfortunately the fix means pulling the trans. So dont bother until the clutches start slipping or you start having rough gear engagement, even then topping up fluid or changing the filter can fix those problems. My 99 did it, I just kept driving.

    Sent from my VS995 using Tapatalk

  4. #4
    Join Date
    Aug 2017
    Location
    Wayne,PA
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    740iL (E38 '01)
    Quote Originally Posted by Timm View Post
    The noise comes (usually) from the rear CV joint - it can be replaced, or more economically the grease can be replaced and the pre-load on the joint checked as described here:

    http://www.meeknet.co.uk/e38/e38_remove_propshaft.pdf
    Thanks, that got to be it!

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