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Old 05-29-2020, 08:56 AM #1
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Upper Arms - Worth it? (Eibach Pro Truck Lift)

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.
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Old 05-29-2020, 09:00 AM #2
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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.
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Old 05-29-2020, 09:12 AM #3
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What should the caster be at ideally?

And any recommendation for decent arms that wont break the bank?
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Old 05-29-2020, 09:15 AM #4
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Quote:
Originally Posted by jtice View Post
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.

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


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Old 05-29-2020, 09:18 AM #5
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Quote:
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What should the caster be at ideally?

And any recommendation for decent arms that wont break the bank?
mid 3s to low to mid 4s
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Old 05-29-2020, 09:36 AM #6
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Aftermarket shocks can add about an inch more down travel which factory UCAs so not accommodate. Aftermarket UCAs do.
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Old 05-29-2020, 12:28 PM #7
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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.
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Old 05-29-2020, 12:40 PM #8
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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.
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Old 05-29-2020, 03:10 PM #9
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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
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Old 05-29-2020, 03:26 PM #10
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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.
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Old 05-30-2020, 12:39 AM #11
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Upper Arms - Worth it? (Eibach Pro Truck Lift)

I have the Eibach and JBA arms



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Old 05-30-2020, 10:58 AM #12
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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.
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Old 05-30-2020, 08:32 PM #13
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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.
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Old 06-08-2020, 12:18 PM #14
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Quote:
Originally Posted by Sky View Post
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.
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.
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Old 06-08-2020, 03:04 PM #15
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2 inches or below you dont need it. The op needs a new alignment shop.
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