2003 Cadillac Deville my car shakes

Tiny
MELBERG75
  • MEMBER
  • 2003 CADILLAC DEVILLE
  • V8
  • AUTOMATIC
  • 113,000 MILES
I can feel my car shaking under the seats when I'm accelerating at aroun 45 to 50 mph. I stops at around 55mph. It also stops when I let off the accelerator. If no one is in the passenger seat it does not do it. It also does it again at 70mph just not as bad. My tires are fairly new and I've have them rotated and balanced twice but it didn't correct the problem. My dad is a mechanic and he's never encountered a promblem like this before. It's really got him scratching his head. Any ideas for him to Check would be of great help. Thanks!
Monday, October 26th, 2015 AT 7:44 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check wheel bearings and axle shafts some have wear also check center bearing on driveshaft and if he has a scanner lock tcc at 35 see if it's torque converter making that.
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Monday, October 26th, 2015 AT 7:50 AM

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