Bump steer fix?
6th Gear Member
Joined: Jan 2007
Posts: 5,469
From: AR
For either situation, take as much looseness out of the front end as possible, this will help, (ball joints, idler arm, tie rod ends, steering box, etc.)
I want to think that a Shelby drop will help bumpsteer a little, any drop that helps to "even up" the tie rods with the suspension will help.
As for the tramlining, it is more pronounced with manual steering, and bias tires, and it is more bothersome when one wheel is in the rut while the other in on the crown of the rut.
My uncle Billy (RIP!!) taught me that pulling next to the dotted line and holding this line on badly rutted roads helps a lot, but you have to keep it in just the right spot or the rut will get a hold of you... (I was 16 and driving an 18 wheeler, bias ply tires, and without power steering at the time, different but the same.....)
Doing this will make you a better driver though....
I want to think that a Shelby drop will help bumpsteer a little, any drop that helps to "even up" the tie rods with the suspension will help.
As for the tramlining, it is more pronounced with manual steering, and bias tires, and it is more bothersome when one wheel is in the rut while the other in on the crown of the rut.
My uncle Billy (RIP!!) taught me that pulling next to the dotted line and holding this line on badly rutted roads helps a lot, but you have to keep it in just the right spot or the rut will get a hold of you... (I was 16 and driving an 18 wheeler, bias ply tires, and without power steering at the time, different but the same.....)
Doing this will make you a better driver though....
4th Gear Member
Joined: Jun 2006
Posts: 1,246
From: Upland, California
I doubt that the issue with your old tires was a bad balance. You'd have had either a steering wheel shimmy (rotational) or a vertical shake as well. I suspect tramlining.
Different tires behave differently as far as tramlining is concerned, and some tire models are much worse than others. Tramlining is frequently confused with bumpsteer, but is a function of tire construction rather than suspension geometry.
stephen - I think your problem is more likely to be tramlining than bumpsteer, since it apparently occurs in a specific stretch of highway. How bad are the truck tire ruts there?
Norm
Different tires behave differently as far as tramlining is concerned, and some tire models are much worse than others. Tramlining is frequently confused with bumpsteer, but is a function of tire construction rather than suspension geometry.
stephen - I think your problem is more likely to be tramlining than bumpsteer, since it apparently occurs in a specific stretch of highway. How bad are the truck tire ruts there?
Norm
Thanks for the explanation!
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