what causes bump steering? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > TJ Wrangler Technical Forum > what causes bump steering?

Ruffstuff XJ Unirail Channel Reinforcement....Even Better Heim Pricing! From RuffstuffUSA Standard Chromoly Front Axle Shaft Kits with Dana 30 4

Reply
Unread 05-07-2006, 11:26 PM   #1
losfreddy
Registered User
 
Join Date: Jan 2006
Location: Katy/Houston
Posts: 699
what causes bump steering?

Can i please get a brief description of what bump steering is and what it feels like, what causes it?

__________________
99 TJ. 5 sp Manual. 4 cylinder. 2.5 liters. airaid intake.
Rock Guards. 32x11.50r15. 4 inch lift. nitro Shocks.
losfreddy is offline   Reply With Quote Quick reply to this message
Unread 05-07-2006, 11:37 PM   #2
Jerry Bransford
Administrator
 
Jerry Bransford's Avatar
2004 TJ Wrangler 
 
Join Date: Jan 2003
Location: Escondido, California, California
Posts: 60,560
Bump steer is when the steering wheel is forced left and right as the front suspension cycles up and down over bumps and dips in the road. It's caused by poor geometry in the steering system, like when the track bar and drag link are no longer parallel... most often cause by installing a dropped Pitman arm when it wasn't needed.
__________________
Getting Savvy...

Coolest offroad magazine ever! CRAWL Magazine

When you have a choice, buy American.
Jerry Bransford is online now   Reply With Quote Quick reply to this message
Unread 05-07-2006, 11:50 PM   #3
losfreddy
Registered User
 
Join Date: Jan 2006
Location: Katy/Houston
Posts: 699
Jerry, how can i tell if my current pitman droparm is an aftermarket one?
__________________
99 TJ. 5 sp Manual. 4 cylinder. 2.5 liters. airaid intake.
Rock Guards. 32x11.50r15. 4 inch lift. nitro Shocks.
losfreddy is offline   Reply With Quote Quick reply to this message
Unread 05-07-2006, 11:59 PM   #4
Jerry Bransford
Administrator
 
Jerry Bransford's Avatar
2004 TJ Wrangler 
 
Join Date: Jan 2003
Location: Escondido, California, California
Posts: 60,560
Quote:
Originally Posted by losfreddy
Jerry, how can i tell if my current pitman droparm is an aftermarket one?
Does your TJ have bumpsteer? If it does, likely you have a dropped Pitman arm. If not, likely you don't have a dropped Pitman arm.

Measurement wise, I think my old non-dropped Pitman arm had maybe an inch of height difference to it. Dropped Pitman arms probably have more like 3". Both of these dimensions are simple WAGS (wild-a$$ed guesses).
__________________
Getting Savvy...

Coolest offroad magazine ever! CRAWL Magazine

When you have a choice, buy American.
Jerry Bransford is online now   Reply With Quote Quick reply to this message
Unread 05-08-2006, 12:05 AM   #5
losfreddy
Registered User
 
Join Date: Jan 2006
Location: Katy/Houston
Posts: 699
yup, that droparm looks like about 3 inches not 1. But why would my steering start bumping now? Think its related to getting mud in the hub cap?
__________________
99 TJ. 5 sp Manual. 4 cylinder. 2.5 liters. airaid intake.
Rock Guards. 32x11.50r15. 4 inch lift. nitro Shocks.
losfreddy is offline   Reply With Quote Quick reply to this message
Unread 05-08-2006, 12:07 AM   #6
losfreddy
Registered User
 
Join Date: Jan 2006
Location: Katy/Houston
Posts: 699
could a night of turning the wheel in the wet mudd have put enough strain on my trackbars and cause my passenger wheel to begin wobbling?
__________________
99 TJ. 5 sp Manual. 4 cylinder. 2.5 liters. airaid intake.
Rock Guards. 32x11.50r15. 4 inch lift. nitro Shocks.
losfreddy is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com 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 e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.