Video request on someone who has bump steer would help!

 

Now that you have explained your issues....I'd agree with rubiredrider and examine your steering stabilizer. Given you have the right geometry, the purpose of the SS is to prevent bumpsteer.

 

Yes it is very frustrating, and kind of disheartening because I have held my suspension lift company with high regards. I still will not say anything bad about there products because I believe my kit to be very well made and the customer service I have had in the past has been great. I just want to know what I have if it's not bump steer, as they were sure to point out!! I am going to get a new SS for sure but I can't help thinking that I'm just hiding a problem that I could fix. I do appreciate all the recommendations I am getting from you guys, really I do! I'm just having a hard time believing that there is nothing that I can do to fix the main issue? And hell if it's just a stabilizer problem that is great easy fix but I couldn't get them to tell me what I could do to fix it or even what is wrong if anything!

 

Yes please show me what it is also!! Because I know what I am getting, it would be nice to see if that's the same!

 

Bump Steer is caused by an improper relationship between the drag link and the track bar! If you added a drop pitman arm to the geometry you have, you would then have bump steer and understand the difference immediately.

What you are describing is "jounce" which can be caused by many factors! When you hit something with a tire, your steering wheel is forced or jounced causing it to jerk.

-the steering stabilizer might be worn out so it is not doing its job properly
-you could have variing tire pressure up front so one side hits an object harder than the other
-tow effects jounce
-an axle not being centered properly in the vehicle can cause jounce.


Hope that gives you some insight!

What kind of tire pressures are you running and with what shocks?

RK

 

Potato, Patato.....

If that definition of bumpsteer were true we could never have bumpsteer on our sport bikes. We have steering stabilizers on the bikes to prevent bumpsteer.

We are all in agreement he needs a SS.

 

Thank you so much!!! JOUNCE that is all I wanted to know!! I here the term bump steer so much on here that I assumed that's what I had and after my call to tec dept. And telling me I didn't have bump steer it left me very clueless as to my issue! I just wish instead of screaming "you don't have bump steer" they would have told me what I had, I really appreciate the info! Now that I know what it is I can solve it! It is most likely a steering stabilizer because it has a rock dent and is worn a bit. But I am not the type of person to throw parts at a problem without knowing what it is and what could cause it! Thank you so much Rock Krawler!!!

 

It's on the list!

 

I'm new to the forum, so please excuse me if I'm not used to the Jeep world's lingo. However, "bump steer", in an automotive engineering sense (where I spent most of my career), is caused by the geometry changing when one or both wheels move through their suspension travel. If you look at the great pic posted earlier in this thread, you'll see the axle is connected to the frame via two lower control arms, which move in an arc. Sitting on level ground, the axle is perpendicular to the frame. As a result the vehicle tracks straight ahead. If both wheels move up or down the same amount, it stays perpendicular to the frame. However, if you move one wheel up or down relative to the other, the axle will rotate away from this perpendicular direction which steers the vehicle away from the straight ahead position. Try this on yourself. Hold a yardstick or something representing an axle with both arms straight ahead. If you were looking down from above, you'd see the yardstick should be perpendicular to the direction you are facing (assuming your arms are the same length!). If you were a Jeep you'd be traveling straight ahead. Now, hold one arm steady and swing the other arm up at a 45 degree angle, to simulate hitting a bump. Now, looking from above you'd see the arm's that's up is rearward of the arm that is level, and your Jeep would be turning in that direction. This is the traditional cause of bump steer (although other factors/components could cause the same symptom, i.e. the vehicle darts off course when a wheel hits a bump). By the way, either front or rear axle could case this. Most cars have suspension systems designed to minimize or eliminate this issue, e.g. independent dual arm suspensions or even struts which move straight up and down. Unfortunately, it goes with the territory for straight axle vehicles. If you increase the suspension travel without proportionally lengthening the control arms, it will get worse. I'm sure the long time Jeep owners know all sorts of ways to minimize this effects with lifts by revising components, adding links, etc.. Sorry for the long post, hope it helps.

 

What a great thread....