MD11Fr8Dog
CM09 Eight Ball winner
[quote author=Jackson link=board=1;threadid=5629;start=msg44512#msg44512 date=1064432022]
I was reading the bump steer thread and decided I should probably know what a shim is. I'm envisioning the wood shims I use to level things out... I suspect it's the same idea.
[/quote]
Figure 1. Shows the stock caster angle of the steering arms.
Figure 2. Shows how that angle is affected by a shackle lift. As the axle housing is rotated forward, the angle of steering axis is no longer correct in relation to the road.
Figure 3. Shows the axle housing rotated back to its stock position using a spring shim.
Installation Note: When installing the Spring Shims, the larger of "fatter" end will always go towards the front of the vehicle . This rule applies when installing shims on either the front or rear axle.
I was reading the bump steer thread and decided I should probably know what a shim is. I'm envisioning the wood shims I use to level things out... I suspect it's the same idea.
[/quote]
Figure 1. Shows the stock caster angle of the steering arms.
Figure 2. Shows how that angle is affected by a shackle lift. As the axle housing is rotated forward, the angle of steering axis is no longer correct in relation to the road.
Figure 3. Shows the axle housing rotated back to its stock position using a spring shim.
Installation Note: When installing the Spring Shims, the larger of "fatter" end will always go towards the front of the vehicle . This rule applies when installing shims on either the front or rear axle.