Re: My caster mod (with pictures)
Mike-
That's a great question. I'm going to have to draw this out on paper and visualize the linkage. Moving the arm back .75" will effectively move the tie rod attach point on the spindle up slightly and slightly to the rear. Because the change is occuring at an arc, the collective position change in the upward and rearward direction is very small. What I need to do is to install the linkage completely on the truck and see if I have an ackerman condition. If so, I could probably shift the idler arm on the passenger side frame rail to compensate, but the pitman arm on the steering box determines the position on the driver side, and that could get tricky.
I believe that the combination of the ball-joint unions on the tie rods and the idler can compensate for the slight alignment change, but until I put the linkage together and see for myself, I'm not 100% convinced.
I'm very interested to get more opinions on this, so feel free to post up any opinions, theory, or data.
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