JBA Offroad Upper Control Arm Install

[Zhehan]

With JBAs and 2” of lift my shop was able to dial in perfect alignment with 4* of caster. Rides nice!

Hey there. Can you take a look at the positions of your alignment cams and post where they are set?

 

[JZiggy]

Hey there. Can you take a look at the positions of your alignment cams and post where they are set?

Sure, next time I get a chance I would be happy to do that.

 

[ZSW99]

If you follow the recommendation by SPC, after choosing Caster position "D" (I think), maxing out the rear Cam (Caster adjustment on these trucks) to move the LBJ forward is how you get the clearance and the better Caster angle. It's the same procedure with the JBA Arms, only the Caster position is already fixed for you.

This doesn't work the same way with the stock arms due to the reduction of the Caster angle after the lift. You cannot get both good Caster and Camber angles with the stock arms. You run out of adjustment.

EDIT: If you look at the Cams on the Toyota trucks with the aftermarket High Caster control arms, you'll see that most of them have the rear cams maxed and front cams in or near the neutral position. That's where mine are. The Alignment Cam Delete kits are based on these common positions.

Rear cams maxed outward is normal on lifted Toyotas. This moves the lbj forward but the jba arms move the top of the spindle back towards the firewall at the same time. The only way to gain significantly more clearance is to keep the upper in roughly the stock spot and use lcas that move the lbj forward. That’s how you get more room and correct the caster. Jba is adding caster by moving the wheel closer to the firewall. I run mine rears maxed, and the fronts middle with roughly 2” lift and it seems decent though

 

[Zhehan]

Rear cams maxed outward is normal on lifted Toyotas. This moves the lbj forward but the jba arms move the top of the spindle back towards the firewall at the same time. The only way to gain significantly more clearance is to keep the upper in roughly the stock spot and use lcas that move the lbj forward. That’s how you get more room and correct the caster. Jba is adding caster by moving the wheel closer to the firewall. I run mine rears maxed, and the fronts middle with roughly 2” lift and it seems decent though

I don't see a way to gain Caster with upper arms that doesn't involve moving the UBJ back a bit. And, it's 3*, so it's not a huge distance, but it's enough to make noticeable difference. The tech who worked on my truck had never seen them before and that shop does a lot of work on lifted Toyotas. He liked the arms quite a bit and said it made his job a lot easier.

SPC gives you the ability to also adjust Camber, so you can run your front Cams all the way in to get the LBJ a bit more forward. That's the advantage to their design. More customization with the UBJ placement.

With the JBAs and the resulting alignment, I have more clearance with the new arms than I did with the stock arms. I went with the JBAs since they would give me what I wanted at a lower price point. From what I researched, there were quite a few issues with SPC's bushings and ball joints. Plus, there were multiple generations of product out in the market. There was enough confusion about that I wanted to steer clear. I do like the SPC rear lower links that I bought.

It's good to have choices, and these days, there are a LOT more choices for our trucks than when they were on the market. It's amazing.

Cheers.

 

[octanejunkie]

I'm running SPCs and cam eliminators

Rear LCA cam is positive, outboard, front cam is neutral.
SPC set to E position (D is basically stock)

With these settings my 33" tires do not rub anywhere on factory 5-star rims and a 3" lift

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