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2000 Pontiac Montana Vibration when accelarating

Tiny
TEAMBANZAI
  • MEMBER
  • 2000 PONTIAC MONTANA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 171,000 MILES
When ever I apply gas to accelarate, If I am in the speed range of 43-53mph the car shimmies and vibrates a bit. This dissappears once a speed of 53+ is reached or if I am accelorating in a lower speed range. It is only when I accelorate in that range that I feel the vibration. If I am coasting at 48 mph or maintaining speed it does not vibrate.

Recent history - 4 new tires within 2 weeks. They have been balanced and rebalanced (rebalancing seemed to reduce the problem a bit). Brand new Tie-Rods within the last 2-3 weeks installed.
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Thursday, April 15th, 2010 AT 10:36 AM

3 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Check engine and transaxle mounts, and ball joints, your shimmy problem is in the sweet spot for bad ball joints, or control arm bushings, and these had a terrible design on the control arms.
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Thursday, April 15th, 2010 AT 2:01 PM
Tiny
TEAMBANZAI
  • MEMBER
  • 3 POSTS
It was the CV Joint - repaired and drives smooth now.
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Friday, May 14th, 2010 AT 1:00 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Most times when the CV is bad, the boot is ripped, and it clicks going around corners.
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Friday, May 14th, 2010 AT 5:20 PM

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