Alignment, Caster, Clearance, and Driving Report with Light Racing UCAs

0* camber (+/- 0.3*)
3.0 caster LF/3.5-3.7 caster RF
0* toe, or toed out 0.5*

These settings work well for me. Cross caster corrects the right pull with larger tires for me

 

I think he means settings for the balljoint in the uca? i put mine at D, but different truck, different lift.

I haven't read the OP in a while, but I'd start at D for caster and in the center of the slot for camber then go from there.

 

yeah, start at D. mine are way off from that now. lol

 

Yeah unfortunately my alignment guy doesn't want to mess with the alignment stuff on the UCA, so I may find a specialty shop, more $$$, but it will be how I want it and they may be able to give me more tire clearance.

Curious what yours are at now? I may re-research this quickly tomorrow and move them to C so i can get more caster...

Does the positive adjustment of caster on UCA move the tire backwards or forwards??

I am also wondering now, at the caster adjust on LCA it moves the tire back towards rear.

 

Mine for some reason are way off from the norm you'll see here. RH side is maxed out, LH is at C. The gave me 3.2/3.7 caster and centered the wheel.

 

Ohh I see. Interesting

 

Good picture to help some about caster adjustment - positive should move the tire forwards

 

Wheel won't move until you start moving the factory lower cams

 

My lr UCAs (3k miles)have been dumping the grease out the bottom after a long backcountry wheeling trip- i definitely flexed out at some point based on i can see my bumpstops made contact a bunch of times- how much of a pain is it to replace the boots? I see they are only $8.50 and someone said you can do it without removing the ball joint. Does anyone know what kind of pliers I'll need for the retaining ring at the top of the grease boot? Anyone else losing grease like this?

 

Mine leak a little. But it's not a big deal to me. Just shoot a couple pumps in here and there

 

265/70/17 mostly street but take a monthly trip to the dirt.

 

thanks i'll keep this bookmarked. running 265/70/17

 

The older model ucas don't have grease zerks on the balljoints. Those were added in the past year or so

 

what's the size of the gold nut on the uca? The one that controls the adjustment

 

iirc it was 32mm or 1 1/4 ??

 

Can anyone tell me for alignment adjustment, that when adjusting the cams in the LCA, does increasing caster change the camber measurement? Does camber become more negative or positive as caster is increased through the LCA.

Trying to figure out the ideal position of the LR UCA bolt ( in, out, or middle) prior to taking to alignment shop. I will not tell them about the UCA adjustment and want them to just fine tune with the LCA. Thank you.

 

thanks. I'll search around and try those

 

Yes 32mm
Edit I couldn't find 32mm but as stated 1 1/4 works perfectly

 

Yes, from my understanding you are correct, caster and camber play off each other and increasing caster with the lca will decrease camber and vice versa. I have the LR UCA's as well, just my $.02 but I would suggest you tell whoever is performing your alignment about the adjustability as well as show them the instructions if they have no experience with them, may save you some headache. I put mine on the "D" setting initially per instructions and the bolt itself for camber adjustment I believe I left somewhere in the middle. I asked the tech to put the lower eccentrics back to neutral and just start from scratch. Most of the fine tuning did come from the lowers however we did have to adjust the UCA's a bit as well. I can tell you from experience if you have an alignment tech who knows what he's doing they can put it right on the numbers you ask for with no issue. Hope this helps...

 

at the shop right now. They cant get exactly three, but 2.9 caster, toe and camber 0. Seems like I'll be good based off this thread. Any input much appreciated. 885s/5100s just installed.