1997 BMW 740 Grinding sound

Tiny
LAUNCH10
  • MEMBER
  • 1997 BMW 740
  • V8
  • 2WD
  • AUTOMATIC
  • 192,727 MILES
I have this grinding and vibration coming from what seems the Passenger side front tire or engine area. I comes at speeds above 40 mph and cruiseing(not on accel or deceleration). I can shift to Neutral when it sounds and it disappears, I can turn engine off and it disappears, if I weave from left and right-no change in sound. I can accelerate disappears. Take foot off gas pedal disappears.I know the brake pads and rotors are good. And rechecked twice with a torque wrench the torque on the wheel lug bolts. What is it?"
Friday, December 12th, 2008 AT 12:06 PM

3 Replies

Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
Check for a collapsed motor mount(s)
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Friday, December 12th, 2008 AT 1:45 PM
Tiny
LAUNCH10
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Sorry, not that. I can duplicate it at around 40 mph and around 1000 to 1500 RPM. Seem to come from Inside the Trans.
Thanks, maybe next time
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Tuesday, December 16th, 2008 AT 2:17 PM
Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
Noises can be very difficult to send through cyberspace.
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Tuesday, December 16th, 2008 AT 5:34 PM

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