vibration

2003 CHEVROLET TAHOE
180,000 MILES
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JOLDBURY
  • MEMBER
  • 1 POST
I have a 2003 4wd tahoe. While driving, it makes loud vibrations underneath and when I step on the gas it makes a loud knocking noise. What could that be?
Jan 13, 2011 at 10:01 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
Check u-joints. Also, make sure the input and output bearings in the differential and transmission are tight and don't have excessive play. Finally, make sure the differential is full and clean.
Jan 27, 2011 at 8:22 PM
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