Caster difference L-R causing pull?? Help please, YES... ANOTHER alignment question

[T101]

Thank you in advance.

YES I used the search tool and couldn't find the exact answer I was looking for.

After installing all new OEM spec LCA's, new camber alignment bolts, and the EBay uniball UCA's, I brought my truck for alignment and I'm now getting a constant pull to the right. It's not from the crown of the road, definitely a stronger pull than I ever had from road crown, and my tires are all at the same PSI.

Have a 0.9 difference in caster from left (4.0) to right (3.1). Everything else looks good as far as I can tell.

QUESTIONS.....

1: Is the caster difference likely the culprit in my constant rightward pull?

2: How exactly is caster adjusted? The UCA's are non-adjustable

THANK YOU for your insight

 

[4RunnerJosh]

Reading your alignment print out it will pull or drift to the right caster has a huge affect on going straight down the road and almost a full degree off will do just that. Caster is adjusted by moving the cam bolts on the lower control arm where it bolts(cam) to the frame both front and rear mount. Cam bolts effect camber and caster specs. Need to get it realigned if you want it to go straight.

 

[gm350reratliff]

I agree^^

They need to spend some more time on the rack adjusting the LCA cams. Ideally, caster will be the same on both sides but I would have them adjust the cams so the right side caster is about .5 degree more than the left with both caster angles at the high end of the caster spec range. Basically, they will have to do the whole alignment over because camber and toe will have to be re-adjusted as well. After the angles look good on the rack, you or the tech should drive the vehicle to see if the pull is still there. If it is, then more adjusting will be required.