Bumpsteer happens when front suspension movement up or down causes the front wheels to deflect (i.e. they steer) which you'll need to correct with the steering wheel every time you go over any bump which causes the suspension to move. If you have bad bumpsteer the truck will be no fun to drive.
On our trucks with a straight axles and a steering box, bump steer is usually caused when someone has jacked or dropped the suspension which will cause the drag link not to be parallel to the ground when your truck is parked at the roadside.
If the draglink makes a big angle up or down at your normal ride height it will cause very noticeable bump steer every time the suspension moves; the cure is to remount the steering box so that the draglink is again parallel to the ground at normal ride height, just like it was with the stock setup.
Stuart.
Last edited by Stuart_Giles; 04/06/2009 11:31 AM. Reason: bad spelling!
