24 Valve Engine and Drivetrain Discuss the 24 Valve engine and drivetrain here. No non-drivetrain discussions please. NO HIGH PERFORMANCE DISCUSSION!

Deceleration thump

Thread Tools
 
Search this Thread
 
Old 04-02-2003, 05:00 PM
  #1  
Registered User
Thread Starter
 
Hottrodjim's Avatar
 
Join Date: Apr 2003
Location: San Diego, California, yea, one of them!
Posts: 104
Likes: 0
Received 0 Likes on 0 Posts
Deceleration thump

I just purchased a 99 2500 76k miles with auto tranny and EZ module. I noticed that when I decelerate or accelerate suddenly I feel a thump. I cannot hear the thump but I can feel it through the truck. It reminds me of the feeling of a loose engine mount. I don't know the history of the truck so I don't know if the tranny was modified for the extra power. What do you think the thump may be?
Old 04-02-2003, 05:04 PM
  #2  
Banned
 
BigBlue's Avatar
 
Join Date: Feb 2002
Posts: 0
Likes: 0
Received 0 Likes on 0 Posts
Re:Deceleration thump

Maybe u-joints?
Old 04-02-2003, 05:59 PM
  #3  
Top's Younger Twin
 
Scotty's Avatar
 
Join Date: Nov 2001
Location: Thanks Don M!
Posts: 3,743
Likes: 0
Received 21 Likes on 19 Posts
Re:Deceleration thump

Could be a defective shock.<br>All four of mine seemed fine, replaced them and the thump is gone and the shocks were all defective.
Old 04-03-2003, 08:55 AM
  #4  
Registered User
Thread Starter
 
Hottrodjim's Avatar
 
Join Date: Apr 2003
Location: San Diego, California, yea, one of them!
Posts: 104
Likes: 0
Received 0 Likes on 0 Posts
Re:Deceleration thump

It could very well be the shocks. I did notice the truck is a little unstable when going over real rough things....like slow traffic, gang bangers and protesters.
Old 04-03-2003, 09:24 AM
  #5  
Top's Younger Twin
 
Scotty's Avatar
 
Join Date: Nov 2001
Location: Thanks Don M!
Posts: 3,743
Likes: 0
Received 21 Likes on 19 Posts
Re:Deceleration thump

[quote author=Hottrodjim link=board=4;threadid=13102;start=0#123759 date=1049381738]<br>It could very well be the shocks. I did notice the truck is a little unstable when going over real rough things....like slow traffic, gang bangers and protesters. <br>[/quote]<br><br>Turn up the stereo. <br>Jack had a problem with his bearings. Not his, the trucks. <br>Problem with a front end is so many things can cause the noises.
Old 04-03-2003, 09:35 AM
  #6  
Registered User
Thread Starter
 
Hottrodjim's Avatar
 
Join Date: Apr 2003
Location: San Diego, California, yea, one of them!
Posts: 104
Likes: 0
Received 0 Likes on 0 Posts
Re:Deceleration thump

The stereo has yet to be upgraded. The front wheel bearings and hubs have been replaced, the ******* said they were cracked and that was causing the thump. Do I look Stupid ? I have a due bill to fix the thump though so I am sure some type of battle will ensue.
Old 04-03-2003, 09:59 AM
  #7  
Top's Younger Twin
 
Scotty's Avatar
 
Join Date: Nov 2001
Location: Thanks Don M!
Posts: 3,743
Likes: 0
Received 21 Likes on 19 Posts
Re:Deceleration thump

Dealer told me it was the track bar...replaced it...still a thumpin'. I had play in the outer right tie rod end and the tie rod end at the pitman arm. Replaced those and put all my stock shocks back on. thump gone<br>Had an alignment yesterday...feels real nice now.<br><br>good luck.
Old 04-03-2003, 10:28 AM
  #8  
Banned
 
BigBlue's Avatar
 
Join Date: Feb 2002
Posts: 0
Likes: 0
Received 0 Likes on 0 Posts
Re:Deceleration thump

Hey Scotty, how's the tranny?
Old 04-03-2003, 10:45 AM
  #9  
Top's Younger Twin
 
Scotty's Avatar
 
Join Date: Nov 2001
Location: Thanks Don M!
Posts: 3,743
Likes: 0
Received 21 Likes on 19 Posts
Re:Deceleration thump

[quote author=BigBlue link=board=4;threadid=13102;start=0#123793 date=1049387324]<br>Hey Scotty, how's the tranny?<br>[/quote]<br><br>EXCELLENT<br>shifts great.
Old 04-04-2003, 12:40 PM
  #10  
Registered User
 
Rally2's Avatar
 
Join Date: Apr 2003
Location: Alberta
Posts: 31
Likes: 0
Received 0 Likes on 0 Posts
Re:Deceleration thump

Jim I chased 2 thump's for awhile, one was the spare tire dangling a bit and the other was a lower front shock bolt.
Old 04-04-2003, 04:19 PM
  #11  
Registered User
 
OlBlue's Avatar
 
Join Date: Jan 2003
Location: Viola Idaho
Posts: 305
Likes: 0
Received 0 Likes on 0 Posts
Re:Deceleration thump

How deep of a bang is it?<br><br>The previous owner could have put in a locker and you're feeling the backlash???
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
marder
3rd Gen Engine and Drivetrain -> 2003-2007
3
04-09-2014 07:00 PM
Flashdancr
12 Valve Engine and Drivetrain
4
10-04-2005 12:45 PM
Joe N.
General Diesel Discussion
14
11-09-2004 11:48 PM
Out of Dodge
HELP!
14
02-26-2004 08:05 AM
barracuda
HELP!
3
10-16-2003 07:57 PM



Quick Reply: Deceleration thump



All times are GMT -5. The time now is 03:20 PM.