It's not the length or the size, it is the relationship to the drag link. With a lift, it makes it much worse. Track bar relocation or dropped pitman arm is the fix, but track bar relocation is the best way to do it.

IIR my bars correctly, the suspension starts wobbling just from normal cycling. Tie rods connect both tires, so they both do it, along with the axle actually moving side to side.

The drag link gets a bump, which translates that back to your pitman arm/steering box. Track bar is supposed to be parallel to keep the axle from going haywire and bouncing around everywhere.

When they are parallel, that translation of lateral bumping is managed by them being parallel and working together to accomplish the same overall thing(basically). Lifting, and unloading the suspension, opens up the angle of the dangle and they kind of scissor open, making them not work together, and actually work somewhat against each other, because as your suspension droops, the axle moves.

It is a pretty complicated thing that is 100x easier to explain in person, and 400x harder to explain on my phone in class.

Pirate really is the best source of information on the internet for most every off-road related things. 50% are professional fabricators/engineers/welders/etc. They put jeep forum to shame when it comes to knowledge, but don't be a noob and just go asking about bump steer/death wobble stuff. The info is all there, just have to find it.

* I understand that posts might have sounded like the ramblings of some drunk wizard, but I do know about it. Just not an exquisite typist *

quote:
its basically a snowball effect that reaches the breaking point after years of neglect

It is more of a design problem. By that, I mean people buying cheap lifts that don't compensate for the geometry changes that occur. User neglect on joints only compounds the problem.

This post was edited on 4/23/13 at 5:00 pm