-
Welcome to the new NAXJA Forum! If your password does not work, please use "Forgot your password?" link on the log-in page. Please feel free to reach out to [email protected] if we can provide any assistance.
Streering Wheel Vibrates over rough road. Ideas?
- Thread starter cem
- Start date
K9Cop
NAXJA Forum User
You've got what is called "Bump Steer". Did you upgrade any of the control arms when you installed the lift? That could be causing it.
xj92
NAXJA Forum User
- Location
- Junction City, KS
Some options:
1. Lower the track bar frame mount
2. Raise the track bar axle mount
3. Get a drop pitman arm
4. Setup high steer on the knuckles
1. Lower the track bar frame mount
2. Raise the track bar axle mount
3. Get a drop pitman arm
4. Setup high steer on the knuckles
dennisuello
NAXJA Forum User
- Location
- Reno, Nevada
K9Cop said:
bumpsteer is caused by draglink and track bar not being parallel. control arms have nothing to do with it. control arms would however have an effect on steering shimmy or "death wobble".
xj92 said:
if all the mounting points are stock there is no need to do 1 or 2, as lifting will increase the angle of trackbar and draglink by the same amount. drop pitman arm will reduce the angle of draglink, but not of trackbar. highsteer with 3" of lift will do more harm than good.
cem, did you use drop pitman arm with the lift? if you did, try swapping back to stock. was the alignment done after the lift? if not recently, it's a good idea to check that first. can you take a pic of the front end steering components?
xj92
NAXJA Forum User
- Location
- Junction City, KS
My lift is at 3.5" with stock mounting for trac-bar and drag-link. When I temporarily ran the RE HD trac-bar and mount, I had no bump steer, and the change was very noticeable. I replaced it (because the diff cover would hit the bar) with a Teraflex unit using the stock mounting locations again and the bump steer is back. It's not bad, but it was a whole lot better with the RE trac-bar and the replacement mount that drops it down. Not a scientific analysis, just my experience.
dennisuello
NAXJA Forum User
- Location
- Reno, Nevada
xj92 said:
RE frame bracket doesn't drop the upper pivot point. but it's definately beefier and flexes way less, which probably contributed to firmer handling.
Hunter-LynchburgVa
NAXJA Forum User
- Location
- Lynchburg,Va/ Richmond,Va
when you say vibrates and rough road, are you just talking normal courdorys or washboards in the road causing this, or is it like if ou hit a pot hole your wheel spins 15 degrees?
Hunter
Hunter
CheapXJ
NAXJA Forum User
- Location
- 570, 813 or 303
out of curiosity...
what size tires are you running, and what pressure do you run them at?
when you run a larger/wider tire, you need to drop the tire pressure a little.
for example:
to get the proper contact patch on my 33X12.50s, I run them at 27psi on the street. I used to run them at 33psi (figuring I'd get better mileage) but all I did was cup the tread, and make the ride quality TERRIBLE (especially over washboards/sharp bumps)
what size tires are you running, and what pressure do you run them at?
when you run a larger/wider tire, you need to drop the tire pressure a little.
for example:
to get the proper contact patch on my 33X12.50s, I run them at 27psi on the street. I used to run them at 33psi (figuring I'd get better mileage) but all I did was cup the tread, and make the ride quality TERRIBLE (especially over washboards/sharp bumps)
