Front Suspension Clunk - Jeep Commander Forums: Jeep Commander Forum
Suspension / Lifts This is the place to discuss the suspension, lift systems, and other stuff underneath your Jeep Commander

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 28 (permalink) Old 06-12-2015, 11:34 AM Thread Starter
Senior Member
Points: 1,884, Level: 25 Points: 1,884, Level: 25 Points: 1,884, Level: 25
Level up: 84% Level up: 84% Level up: 84%
Activity: 0% Activity: 0% Activity: 0%
 
Schlotzky's Avatar
 
Join Date: Aug 2014
Location: Auburn, WA
Posts: 180
Front Suspension Clunk

The Commander is getting really clunky over sharp bumps, like manhole covers and potholes. Progressive compression/droop is smooth and noise-free. It seems to be coming from both sides. My experience with bad ball joints seems to be more of a popping sound, and worsened by turning one direction or another, and that doesn't seem to be the case here.

103xxx miles at this point, and I've replaced the shocks and shock mounts, sway bar bushings and end links, none of which had any effect on the clunking.

Where should I be looking next?

2007 Red Rock Crystal Pearl Overland
- 2" Daystar lift - 245/75/17 Revo 2s - 1.5" Spidertrax Spacers -
Schlotzky is offline  
Sponsored Links
Advertisement
 
post #2 of 28 (permalink) Old 06-12-2015, 12:43 PM
Senior Member
Points: 7,991, Level: 60 Points: 7,991, Level: 60 Points: 7,991, Level: 60
Level up: 21% Level up: 21% Level up: 21%
Activity: 0% Activity: 0% Activity: 0%
 
luckyse7ens's Avatar
 
Join Date: Apr 2014
Location: CA
Own a Commander?: Yes
Model year: 2010
Trim Package: Sport
Power-Train: 3.7L V-6
2WD
If 4WD - system: QT-I
Current Mileage: 140000
Posts: 1,585
How do the rest of your bushings look? Does it clunk under hard acceleration/deceleration?
luckyse7ens is offline  
post #3 of 28 (permalink) Old 06-12-2015, 09:23 PM Thread Starter
Senior Member
Points: 1,884, Level: 25 Points: 1,884, Level: 25 Points: 1,884, Level: 25
Level up: 84% Level up: 84% Level up: 84%
Activity: 0% Activity: 0% Activity: 0%
 
Schlotzky's Avatar
 
Join Date: Aug 2014
Location: Auburn, WA
Posts: 180
I haven't been able to see anything visibly over worn or degrading.
I'm also noticing the clunks are much easier to replicate when only one tire hits the bump (either front) whereas a sharp speed bump where both tires hit at the same time takes a bigger jolt to clunk. This to me points to the sway bar, as it should be the only motion that is changed by one wheel bouncing vs two. so having replaced all the sway bar attachment points has me baffled.
Schlotzky is offline  
 
post #4 of 28 (permalink) Old 06-13-2015, 10:22 AM Thread Starter
Senior Member
Points: 1,884, Level: 25 Points: 1,884, Level: 25 Points: 1,884, Level: 25
Level up: 84% Level up: 84% Level up: 84%
Activity: 0% Activity: 0% Activity: 0%
 
Schlotzky's Avatar
 
Join Date: Aug 2014
Location: Auburn, WA
Posts: 180
I noticed I missed your question there. No, hard acceleration/deceleration does not trigger the clunks. Neither do large, rolling, albeit aggressive speed bumps where the whole vehicle rocks like a boat. In fact, in those cases I sometimes hear a clunk from the rear axle.
Schlotzky is offline  
post #5 of 28 (permalink) Old 06-15-2015, 04:03 PM
Senior Member
Points: 7,991, Level: 60 Points: 7,991, Level: 60 Points: 7,991, Level: 60
Level up: 21% Level up: 21% Level up: 21%
Activity: 0% Activity: 0% Activity: 0%
 
luckyse7ens's Avatar
 
Join Date: Apr 2014
Location: CA
Own a Commander?: Yes
Model year: 2010
Trim Package: Sport
Power-Train: 3.7L V-6
2WD
If 4WD - system: QT-I
Current Mileage: 140000
Posts: 1,585
Hrm. Well there are two different sway bar diameters available. Maybe you have the smaller sway bar and the bigger bushings?
luckyse7ens is offline  
post #6 of 28 (permalink) Old 06-15-2015, 05:24 PM Thread Starter
Senior Member
Points: 1,884, Level: 25 Points: 1,884, Level: 25 Points: 1,884, Level: 25
Level up: 84% Level up: 84% Level up: 84%
Activity: 0% Activity: 0% Activity: 0%
 
Schlotzky's Avatar
 
Join Date: Aug 2014
Location: Auburn, WA
Posts: 180
I have the overland, which should be the bigger bar. And I did double check with a caliper before installing the bushings, so I know they are correct for the application. I'll dig around under the Commander more today and see if I come up with any new information. Thanks for the input so far!
Schlotzky is offline  
post #7 of 28 (permalink) Old 06-15-2015, 09:07 PM
Senior Member
Points: 4,427, Level: 42 Points: 4,427, Level: 42 Points: 4,427, Level: 42
Level up: 39% Level up: 39% Level up: 39%
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: May 2014
Own a Commander?: Yes
Model year: 2006
Trim Package: Sport
2WD
If 4WD - system: QT-I
Posts: 139
omega48er is offline  
post #8 of 28 (permalink) Old 06-16-2015, 08:59 AM
Senior Member
Points: 6,645, Level: 53 Points: 6,645, Level: 53 Points: 6,645, Level: 53
Level up: 48% Level up: 48% Level up: 48%
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Jun 2009
Location: Mission, TX
Posts: 405
Also replace the swaybar end links that really made a difference on mine as well.

06 Jeep Commander 4.7 QT II wih RC lift, Superchips 3872 and 245/75R17 Thunderer MT Tires

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
fco27 is offline  
post #9 of 28 (permalink) Old 06-16-2015, 01:32 PM
Senior Member
Points: 7,991, Level: 60 Points: 7,991, Level: 60 Points: 7,991, Level: 60
Level up: 21% Level up: 21% Level up: 21%
Activity: 0% Activity: 0% Activity: 0%
 
luckyse7ens's Avatar
 
Join Date: Apr 2014
Location: CA
Own a Commander?: Yes
Model year: 2010
Trim Package: Sport
Power-Train: 3.7L V-6
2WD
If 4WD - system: QT-I
Current Mileage: 140000
Posts: 1,585
Quote:
Originally Posted by fco27 View Post
Also replace the swaybar end links that really made a difference on mine as well.
He said they were replaced already.
luckyse7ens is offline  
post #10 of 28 (permalink) Old 06-19-2015, 12:48 PM Thread Starter
Senior Member
Points: 1,884, Level: 25 Points: 1,884, Level: 25 Points: 1,884, Level: 25
Level up: 84% Level up: 84% Level up: 84%
Activity: 0% Activity: 0% Activity: 0%
 
Schlotzky's Avatar
 
Join Date: Aug 2014
Location: Auburn, WA
Posts: 180
Even though my clunk didn't seem to be described by that thread, I went ahead and bought a set of external torx sockets and tightened the steering rack. No change. I also saw a thread about tightening the sub frame bolts so I'll try that next. Everything I see under there looks to be in good shape, with no more that minor surface cracking on a couple lower control arm bushings.
Schlotzky is offline  
Sponsored Links
Advertisement
 
Reply

  Jeep Commander Forums: Jeep Commander Forum > Jeep Commander Discussion > Suspension / Lifts

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Jeep Commander Forums: Jeep Commander Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome