Quote:
Originally Posted by 399stroker
Maybe I am just looking at this all wrong... I dunno, but it seems like with the spherical upper bushings that the angle of the pinion changes as it rotates around. I know for sure that the length is not changing as the jam nuts on the uca's are locked down but I can twist both of my uppers all around laterally as they just move on the spherical balls on both ends.
I just changed over from weight jackers to team z for the lowers, and it had a drastic effect on my pinion angle. I havnt screwed around with it yet though to try and get it back. I never realized it but my weight jackers were adjusted to just over 18 inches. I installed the team z's at 17.5, which from what I understand is where they should be to start, and then adjust it from there as you stated with wheel well measurements etc to make sure it is centered on the chassis correct? Then adjust the uppers to correct the pinion angle correct? Or do I have that backwards?
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If both your uppers and lowers are adjustable, you can even manage to move your whole rearend forwards and backwards in your wheel wells if needed. Just be careful that you don't move your rearend back too far or you will not have many threads left for reliable engagement in your uppers.
As far as adjusting your uppers to obtain a centered rearend, if your body is straight, your upper adjustments should be no more than one turn different from each other. You can adjust either your uppers or your lowers to obtain the pinion angle you want. Keep in mind that if your lowers are adjusted to different lengths from each other, your rear will move a little from side to side, too, but not as dramatically as the same amount of turns on your uppers.
For your lowers, I would strive to keep them the same length/number of turns out from full closed. That way, as long as you keep the turns equal from one side to the other, you know they will be the same length. Then just use your uppers to center the rearend to start with. Once the rear is centered, then any further pinion angle adjustments will be an equal amount of turns from side to side for the upper pair and the lower pair.