# Single Thump When Slowing

**URL:** <https://community.cartalk.com/t/single-thump-when-slowing/50810>\
**Category:** Maintenance/Repairs\
**Tags:** sl, noises, saturn\
**Created:** [June 24, 2010, 4:09pm UTC](https://community.cartalk.com/t/single-thump-when-slowing/50810 "2010-06-24T16:09:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![chadparrish76](https://avatars.discourse-cdn.com/v4/letter/c/bbe5ce/32.png) [@chadparrish76](https://community.cartalk.com/u/chadparrish76)\
**Post date:** [June 24, 2010, 4:09pm UTC](https://community.cartalk.com/t/single-thump-when-slowing/50810/1 "2010-06-24T16:09:54Z")

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Hi!  
  
  
  
 I have a '98 Saturn SL1 with an automatic transmission and 145,000 miles on it. I am mostly car illiterate but not afraid to learn and get my hands dirty.  
  
  
  
 In the summer time while slowing down I hear a single loud thump and feel a jerk. It sounds as though it’s coming from the back of the car. I believe it may only happen when the AC is on. Also, I’ve slowed to under 15-20 miles an hour when it occurs.  
  
  
  
 Any idea what this could be? Or anything else I should check?  
  
  
  
 Thanks!  
  
 Chad

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**Author:** ![ignoramus9](https://avatars.discourse-cdn.com/v4/letter/i/d07c76/32.png) [@ignoramus9](https://community.cartalk.com/u/ignoramus9)\
**Post date:** [June 24, 2010, 5:36pm UTC](https://community.cartalk.com/t/single-thump-when-slowing/50810/2 "2010-06-24T17:36:15Z")

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cv joints?