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Bucks when accelerating

Tiny
EJURSICH
  • MEMBER
  • 2002 CHEVROLET ASTRO
  • 207,000 MILES
Van bucks (a clunking feel @ rear) when accelerating, occurs again when coming to a stop. Gets worse as van warms up The "clunking" doesn't always occur. Usually when warmed up. It gets worse the more I drive. It "clunks" 4, 5, 6 times as I accelerate, gets progressively harder. The reverse happens when you slow down and stop. Checked u- joints, no problem. Van doesn't vibrate at speed. Transmission seems to shift and work properly.
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Monday, July 9th, 2012 AT 2:51 PM

3 Replies

Tiny
EJURSICH
  • MEMBER
  • 4 POSTS
Astro van is All wheel drive.
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Monday, July 9th, 2012 AT 2:54 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
I would look at the joints again. Did you remove the rear drive shaft and check for a seized joint?

Roy
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Monday, July 9th, 2012 AT 5:05 PM
Tiny
EJURSICH
  • MEMBER
  • 4 POSTS
I'll pull the shaft and check. This is driving me crazy. Thanks for the info!
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Monday, July 9th, 2012 AT 6:48 PM

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