JBA Offroad Upper Control Arms And Suspension MEGA Thread BS thread

More castor. Should be ideally 3.8*

 

According to the shop any higher on the caster he won’t be able to get camber within spec. Does that sound wrong ?

 

Yes that sounds wrong. I had to go to an off road specific shop. What some mechanics do not understand is that these UCA's are built to have higher caster numbers so the stock numbers no longer apply. If it were the stock UCA's and the mechanic was going off the numbers in their alignment machine then they would be correct. New JBA UCA's=non-standard caster numbers. I have a third gen but my toe and camber at around 0 and the caster is 4.5 and the truck drives so great!! Also when I am at full lock and mostly turning left with a bump I get rubbing too. My tires rub the ROckBlokz mudflaps I bought. It bothered me at first but now I am not so worried. It happens.

 

Did you get the high castor arms or the stock castor arms?

 

The more i read about UCA, the more confused i get. One said only SPC UCA has the ability to move the wheel forward. While the other UCA maker moves it back??

 

I got the high caster arms. I’m going back to the shop when they open at 8. So I should have them try and get as close to 3.8° on both sides with camber & toe at 0°? Thanks for the response!

 

Yes, I pm'd you the alignment#'s youll need. The tech should have no problem getting them within the spec I gave you.

 

SPC adjustability is a gimmick. There is only one logical position the SPC control arms should be set at.

 

Awesome thanks for the info! Hopefully the tech can get it right this time

 

This image and these numbers were sent to me from JBA after I bought the UCA from them. This is an optimal numbers sheet straight from the manufacturer of the UCa's.

 

Funny
Your pic is "chop shop" and folks listen to your statements?

What is "gimmicky" about having more adjustability.
Near as i can see is "ignorant" to how they actually function.

And whats with all that toe in in that last pic posted? Thats the recomended from JBA?
That will eat tires with all the toe in.
The caster is just allmost into the sweet spot 3.5 to 4.5, might not wander all over the place just going straight.

I am just shadetree so take with grain of salt.

 

The gimmick is that any other position in SPC will result in crap wheel placement inside the wheel well.

 

From what?
The recommended "D" setting.
Some have found that by adjusting the balljoint setting, which is not on any other UCA, is offering more clearances with a "G" setting at the SPC UCA, for 35" tires...so as not to rub the body mount.

Not only that the SPC gives you an adjustable camber, no others have that.

Most of that bad rep these SPC got in the beginning seemed to me like bad installs from folks that should not have been working on these in the first place. Utube mechanics.

 

@BackOff I think you hit the nail on the head. I bought my first set of SPC arms before there was even a JBA option. With 34's I found that "E" helped with the cab mount rubbing and now with 35's the "F" position is ideal. I have a plate bumper which allows for the tire to be pushed forward without rubbing. It would be a different story if I still had the factory front bumper. Still getting 4 degrees caster in the "F" position since the lower cams are maxed in at the front & out at the rear. With that said, if I had to buy another set of arms and I was keeping the factory bumper, I would definitely give the JBA arms a try. I like that they can take a off the shelf ball joint and I know he stands behind his work....

 

Then go get you some SPC's. I know there is a fan club for em, but I deal with diagnosing issues with them more than any other brand. When I install them, they are done correctly.

 

Have had SPC since 2011...zero issues.

 

Also have had SPC, all issues, but I also wheel the fucking shit out of my truck. SPC is good for a pavement princess.

 

Sure thing bud.
And by the way "castor" is oil.
CASTER is something you can adjust.

 

Ah, you're also a grammar enthusiast, you mom must be so proud.

 

All brand loyalty aside, I've "followed" @Texoma 's work for a few years now. He has a good reputation and I would take what he says to be truth. He's installed a TON of UCAs on multiple variants of Toyota "trucks".

Let's keep this thread on track for just JBA stuff.