# What is that F-d-d-d-d-d-d-d Vibration?

**URL:** <https://community.cartalk.com/t/what-is-that-f-d-d-d-d-d-d-d-vibration/49906>\
**Category:** Maintenance/Repairs\
**Tags:** vibration, bmw, 328, brakes\
**Created:** [June 5, 2010, 8:16pm UTC](https://community.cartalk.com/t/what-is-that-f-d-d-d-d-d-d-d-vibration/49906 "2010-06-05T20:16:31Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Manolito](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/manolito/32/3070_2.png) [@Manolito](https://community.cartalk.com/u/Manolito)\
**Post date:** [June 5, 2010, 8:16pm UTC](https://community.cartalk.com/t/what-is-that-f-d-d-d-d-d-d-d-vibration/49906/1 "2010-06-05T20:16:31Z")

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1997 BMW 328 Automatic, 150k miles  
  
  
  
 80 mph or higher, a slight left curve makes the whole car shake and make a noise like it has gone off on the shoulder and hit the rumble strip - but the highway is smooth.  
  
  
  
 If I floor it in first gear, there will be a brief 1-second bout of the same noise. It feels and sounds rather as though the antilock brakes were engaging, except the car is not slowing down, it is accelerating hard.  
  
  
  
 I disengaged the ASC and tried the low gear acceleration - no change.  
  
  
  
 The sound and frequency of the vibration makes me want to focus on the antilock brake system, but that should not engage unless the brake is pressed, right? I have no warning lights lit.  
  
  
  
 Thanks for any suggestions.