Re: Drop pitman arms and bump steer

[tsm1@xxxxxxxxx]

> traversed the hump while holding the steering wheel
> straight, the front end of the truck went down/left
> and up/right in the oscillations.  This is clearly
> bump steer.  The reason eludes me though.  It would
> seem that the reason is that the drag link, while
> being held still at the steering box, tries to get
> longer in horizontal distance from the PS box as it
> subscribes the arc traveling upwards.  As this
> happens, it pushes the right front wheel out to make a
> right turn.  then the rebound is the other way, up
> gives a turn to the left.  But, the actual bump steer
> is just the opposite, down and LEFT, instead of the
> explano of down and right.  Anyone?

It works just like you think, Joel.. DOWN AND LEFT, UP AND RIGHT.

As the axle comes up, the steering box end is "fixed" so the knuckle end
gets pushed farther away from the box, making a right turn.

As it droops, it does the opposite.