Members Login
Username 
 
Password 
    Remember Me  
Home Page → Great Lakes XJ → General XJ/MJ Technical → Thud coming from rear end
 

Topic: Thud coming from rear end

Post Info
Jeepguy91
Guest
Status: Offline
Posts: 407
Date:
Thud coming from rear end
Permalink  
Well i have a thud coming from the rear of the xj that sounds like something is banging into something else. I don't have to be moving to get the thud. If i bounce up and down on the rear bumper i can get it to do it. With that being said it makes me think that it is something in the rear suspension. I now that this is kinda of vague, but doesn't anybody have any idea of where i should start looking at to fix this. I want to get everything ready and finished on it so i can make it to haspin for the Winter Fest.

Thanks,
Ben

__________________

1996 Grand Cherokee Limited 3.5" rough country, 265 courser at's, roof rack, winch bumper, dana 44, 8,000 lb. winch
LEAD_NOT_FOLLOW
GLXJ PRESIDENT
Status: Offline
Posts: 3934
Date:
Permalink  
Rear shackle on the exhaust pipe...

__________________
'93 XJ Cherokee Sport - build thread
'89 XJ Cherokee Laredo - build thread
'88 MJ Comanche Pioneer SWB - build thread
'87 MJ Comanche LWB
'94 YJ Wrangler - build thread


glxj_banner.jpg
Jeepguy91
Guest
Status: Offline
Posts: 407
Date:
Permalink  
Well it doesn't sound like its hittin the exhaust pipe. It just sounds like a deep thud coming from the rear end when the suspension bounces.

__________________

1996 Grand Cherokee Limited 3.5" rough country, 265 courser at's, roof rack, winch bumper, dana 44, 8,000 lb. winch
threeEs99
Guest
Status: Offline
Posts: 1078
Date:
Permalink  
broken upper shock mount? or worn lower bushing of shock

__________________

99 sport.
rust bucket, DD, 3 car seats
04 wj (w/3 car seats too)
DD duty for the lady  
Jeepguy91
Guest
Status: Offline
Posts: 407
Date:
Permalink  
Will check the mount. The shocks are brand new so i don't think its the bushings.

__________________

1996 Grand Cherokee Limited 3.5" rough country, 265 courser at's, roof rack, winch bumper, dana 44, 8,000 lb. winch
jfiscus
Guest
Status: Offline
Posts: 205
Date:
Permalink  
Possibly a broken leaf spring or center pin or shackle?
Any of those need ruled out & fixed asap if that is your problem.
I have to assume your (new) shocks are still attached to their upper mounts & your u-bolts are tight.

__________________
'89 XJ Pioneer - 33s, skids. lift, snorkle, HO engine, etc
LEAD_NOT_FOLLOW
GLXJ PRESIDENT
Status: Offline
Posts: 3934
Date:
Permalink  
What rear shackels are you running?

The stock shackels are know to have the bushings go bad and you'll get a "clunk clunk" out of them if the bushings are bad.

__________________
'93 XJ Cherokee Sport - build thread
'89 XJ Cherokee Laredo - build thread
'88 MJ Comanche Pioneer SWB - build thread
'87 MJ Comanche LWB
'94 YJ Wrangler - build thread


glxj_banner.jpg
Jeepguy91
Guest
Status: Offline
Posts: 407
Date:
Permalink  
Well i know that on the front leaf spring mount, the part of the leaf that wraps around the bolt and almost touches the spring, broke off a little chunk of it. Just found it today. Do you think that that could be where my noise is coming from?

Also i am running the stock shackle in the rear. Will check the bushings in it also.

__________________

1996 Grand Cherokee Limited 3.5" rough country, 265 courser at's, roof rack, winch bumper, dana 44, 8,000 lb. winch
aci4369
LIFETIME MEMBER
Status: Offline
Posts: 3094
Date:
Permalink  
Why don't you get someone to jump on the bump, or what ever makes the noise, and then you crawl under there and chaise the noise down?  Thats what I would do.  Then you would have a better idea of where it is coming from exactly.

__________________

'99 XJ, 5.5" lift, 33" MT's
'11 Dodge Charger

I miss the days that they made toys that could kill a kid.

*Support our Troops*


My Pics and Specs

My Build Thread
Jeepguy91
Guest
Status: Offline
Posts: 407
Date:
Permalink  
I would its just that i am working 3rds so nobody home when i am. Plus its parked outside next to house in the cold. Was just seeing if anybody has had this same kind of problem in the past.

__________________

1996 Grand Cherokee Limited 3.5" rough country, 265 courser at's, roof rack, winch bumper, dana 44, 8,000 lb. winch
aci4369
LIFETIME MEMBER
Status: Offline
Posts: 3094
Date:
Permalink  
shoot me a pm if u want me to help.  should be around when u dont work.

__________________

'99 XJ, 5.5" lift, 33" MT's
'11 Dodge Charger

I miss the days that they made toys that could kill a kid.

*Support our Troops*


My Pics and Specs

My Build Thread
john43081
Guest
Status: Offline
Posts: 4
Date:
Permalink  
well i have the same prob and it was the shock top bolts came loose and i had to reach through a small space buy the mount and tighten them up and the sound went away good luck

__________________
 
Page 1 of 1  sorted by
Quick Reply

Please log in to post quick replies.
 
Tweet this page Post to Digg Post to Del.icio.us


Create your own FREE Forum
Report Abuse 		Powered by ActiveBoard