Upper Arms - Worth it? (Eibach Pro Truck Lift)

jtice

jtice

New member
I have a 2016 SR5 4Runner with an Eibach Pro Truck Lift in stalled now for a few months.
Love the lift, nice improvement over stock.
Before I bought the lift I read that you do not need to change any A-Arms with it, since you are only lifting about 2" or so.
While the ride and handling of my 4R is not bad, I wonder if it could be better.
I do notice a bit more feedback from the road into the steering.
Doesnt wander or anything like that, you just feel the ruts and potholes in the steering a bit more.

Has anyone had this lift, or one like it installed for a while, THEN installed A-Arms?
Did you notice a difference you think made it work getting the arms?

Here is the readout from my alignment.
i-3vsw3xK-X4.jpg
 
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My thoughts are that your caster is definitely too low. I'd try another alignment shop and see how much additional caster they can get while keeping everything else in spec. If 1ish degree is all they can do, i would look into some upper control arms for sure. Your handling will improve significantly.
 
What should the caster be at ideally?

And any recommendation for decent arms that wont break the bank?
 
jtice said:
I have a 2016 SR5 4Runner with an Eibach Pro Truck Lift in stalled now for a few months.
Love the lift, nice improvement over stock.
Before I bought the lift I read that you do not need to change any A-Arms with it, since you are only lifting about 2" or so.
While the ride and handling of my 4R is not bad, I wonder if it could be better.
I do notice a bit more feedback from the road into the steering.
Doesnt wander or anything like that, you just feel the ruts and potholes in the steering a bit more.

Has anyone had this lift, or one like it installed for a while, THEN installed A-Arms?
Did you notice a difference you think made it work getting the arms?

Here is the readout from my alignment.
i-3vsw3xK-X4.jpg
Click to expand...


Your caster is really low # should be ~4*, that feedback through steering column over potholes will be gone when you get high caster UCA . I had same problem but with deferent setup . Good luck


Sent from my iPhone using Tapatalk
 
Aftermarket shocks can add about an inch more down travel which factory UCAs so not accommodate. Aftermarket UCAs do.
 
Had similar numbers when i did my lift. Drove fine but handling wasnt the same. Eventually replaced them and the car drove much better on and off road (3.9 castor). Few options out there but i think the more affordable ones are jba, spc, and dobinsons. All 400 to 550ish. Others have tried more affordable but lesser known brands but not sure how its going for them.
 
tire wear might be fine but adding uppers brings the drivability to a whole new level. So, not necessary, but man you notice it immediately and it's a great feeling. highway driving requires way less input, steering feels less twitchy.
 
Not worth it... I say keep your stock upper control arms until you HAVE to change them, I.e. if the stock ones no longer clear your aftermarket coilovers

Don't let the marketing BS fool.you, the stock ones are plenty strong, quiet, and maintenance free throughout their useful lifetime
 
Totally worth it. JBA UCA @ ~4.2 degrees caster w/ Eibach Pro-Truck lift. Makes a big difference and drives like a dream now - handling improved significantly.
 
I ran mine with a set of OME 883 springs and stock upper arms. Even at about 1.75" of lift I had decreased caster and I could tell. Especially on the highway. I swapped out to Eibach springs in the front and put JBA arms on at the same time. I already had Eibach rear springs. WAY better handling and the tracking on the highway is vastly improved. I went through the same thing on an 05 tacoma a few years back. On that one I used SPC arms but boy what a difference in how it drove afterwards.
 
I put the Eibach Pro Truck Lift on my 19 ORP last week.
Had it aligned a couple days ago- tech had no issue getting caster to 3.4L and 3.2R. This is with stock UCA's.
I'd had asked him to get as much as he could but was not able to verify he did or just put it in the middle of the factory spec.
It had 2.0 caster when I finished the lift before it was aligned.
 
Sky said:
I put the Eibach Pro Truck Lift on my 19 ORP last week.
Had it aligned a couple days ago- tech had no issue getting caster to 3.4L and 3.2R. This is with stock UCA's.
I'd had asked him to get as much as he could but was not able to verify he did or just put it in the middle of the factory spec.
It had 2.0 caster when I finished the lift before it was aligned.
Click to expand...

What kind of wheels and tires do you have?


Seeing a lot of mixed reviews on having UCAs or not. So far I see a lot recommends it.
 
To fit 285/70/17 or 285/75/17 tires on stock trd wheels without wheel spacers, which UCAs would work. Seemed like JBA will not. How about Dobinsons or SPC?
 
Johnnyg182 said:
To fit 285/70/17 or 285/75/17 tires on stock trd wheels without wheel spacers, which UCAs would work. Seemed like JBA will not. How about Dobinsons or SPC?
Click to expand...

285/70/17 will fit with no lift and no spacers on trd offroad wheels. if you add spacers they will rub more.
 
Not worried about fitting the 285s on stock truck but rather one with stock pro wheels and aftermarket UCAs. I saw posts that wheel spacers were needed to run the JBAs. Wondering if the same is needed with dobinsons or SPC UCA.
 
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