vibration

2004 CHEVROLET AVALANCHE
45,000 MILES • V8 • 4WD • AUTOMATIC
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RANDY SMITH
  • MEMBER
  • 3 POSTS
2004 chevy avalanche,after going into 4th gear there is a bad vibration,stops when pushing down on gas and gearing back down
Dec 7, 2010 at 11:00 AM
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FIXITMR
  • ✓Experienced Mechanic
  • 9,990 POSTS
what speed and rpm is the vibration at?
Dec 7, 2010 at 11:16 AM
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RANDY SMITH
  • MEMBER
  • 3 POSTS
it vibrates between 45 and 55
Dec 8, 2010 at 10:26 AM
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RANDY SMITH
  • MEMBER
  • 3 POSTS
rpm are around 19 or 20 thousand
Dec 8, 2010 at 10:27 AM
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FIXITMR
  • ✓Experienced Mechanic
  • 9,990 POSTS
are you running oversize tires? 1900 is a fairly low rpm and i noticed my own van has a shuddering vibration as the rpms drop and it is still in overdrive. it's caused by the gear ration being to high and the added strain of firing against this impossible load ratio turns up as vibration.
Dec 9, 2010 at 10:03 AM
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