2018 stamped upper control arm swap question with Eibach leveling

[Pullmeover18]

Im looking to do a Eibach leveling kit on my 2018    It appears once I level the truck I will need to replace the stamped steel uppers since they are inferior.   Each aftermarket company uppers claims to rub with factory rims and 33's.   Can I install 2014 aluminum uppers on my 2018???.   Has anyone done this to their 2018?

 I am looking at the Eibach leveling pro kit that comes with adjustable shocks and new springs.  Has anyone used the Eibach kit?    I was told by Eibach that some aftermarket control arms interfere with the spring.   This makes me believe the 2014 alum upper swap may be the ticket????

Edited July 15, 2020 by Pullmeover18

[silveradosid]

if your truck came with steel uca you cant put aluminum control arms in. the 2014 like mine has a different steering knuckle 

[Pullmeover18]

9 hours ago, silveradosid said:

if your truck came with steel uca you cant put aluminum control arms in. the 2014 like mine has a different steering knuckle 

So Readylift control arms fit 14-18 trucks that had alum or stamped is what throws me off as far as fitment?    What makes the knuckle different on your truck ?

 

description from readylift uca

• Fits 2016.5 to current GM 1500 trucks and SUVs that came with Stamped Steel upper control arms.
• Will also work on 2014-2016 GM 1500 trucks that came with factory aluminum control arms

 

Edited July 15, 2020 by Pullmeover18

[Pullmeover18]

Rock Auto replacement stock uppers show the same part number for 2018 and 2014 in the aluminum??   Hope someone has tried to mount them on a 2018 !!

[Ray Capobianco]

which ones are you planning on going with? for the cost it may just be cheaper to get a leveling kit that comes with the UCA as they are meant to fix ball joint angles associated with the lift. 

 

so even though you wont rub with OE aluminum arms, they still will have an improper angle...supposedly.

Personally, i am using the rubbing as an excuse to go with aftermarket wheels and sticking with stock arms and a 2" level 

[newdude]

15 hours ago, Pullmeover18 said:

Im looking to do a Eibach leveling kit on my 2018    It appears once I level the truck I will need to replace the stamped steel uppers since they are inferior.   Each aftermarket company uppers claims to rub with factory rims and 33's.   Can I install 2014 aluminum uppers on my 2018???.   Has anyone done this to their 2018?

 I am looking at the Eibach leveling pro kit that comes with adjustable shocks and new springs.  Has anyone used the Eibach kit?    I was told by Eibach that some aftermarket control arms interfere with the spring.   This makes me believe the 2014 alum upper swap may be the ticket????

 

GM discontinued the aluminum arms.  If you have a truck with aluminum arms and they needed to be replaced, GM superseded them to the stamped arms.  The last time they were used in production was very early 2016 trucks.  Part # is gone from the catalog too and supersedes to the stamped #s.      

 

Stamped and aluminum use the same knuckle, the forged steel control arm trucks use a different knuckle.  That is why the stamped/aluminum are interchangeable for the aftermarket.  

 

[Pullmeover18]

31 minutes ago, Ray Capobianco said:

which ones are you planning on going with? for the cost it may just be cheaper to get a leveling kit that comes with the UCA as they are meant to fix ball joint angles associated with the lift. 

 

so even though you wont rub with OE aluminum arms, they still will have an improper angle...supposedly.

Personally, i am using the rubbing as an excuse to go with aftermarket wheels and sticking with stock arms and a 2" level 

I was considering  Readylift arms with Eibach springs and struts.   I want my stock 20" wheels for winter and ok with buying other wheels but for summer.   Also spare tire must fit.   

[Pullmeover18]

1 minute ago, newdude said:

 

GM discontinued the aluminum arms.  If you have a truck with aluminum arms and they needed to be replaced, GM superseded them to the stamped arms.  The last time they were used in production was very early 2016 trucks.  Part # is gone from the catalog too and supersedes to the stamped #s.      

 

Stamped and aluminum use the same knuckle, the forged steel control arm trucks use a different knuckle.  That is why the stamped/aluminum are interchangeable for the aftermarket.  

 

I was looking at the aftermarket replacement aluminum from rockauto.    Thank you for the info.   So the only other question is with a 2.5 leveling will the aluminum be ok or will they wear out because of angle?    Not sure if these tubular aftermarket guys are capturing the angle problems and just making the ball joint re-inforced?

[Ray Capobianco]

5 minutes ago, Pullmeover18 said:

I was considering  Readylift arms with Eibach springs and struts.   I want my stock 20" wheels for winter and ok with buying other wheels but for summer.   Also spare tire must fit.   

ah ok that makes sense. 

could always just run a stock size tire for the winter. You want a skinnier tread anyways for snow.

[newdude]

2 minutes ago, Pullmeover18 said:

I was looking at the aftermarket replacement aluminum from rockauto.    Thank you for the info.   So the only other question is with a 2.5 leveling will the aluminum be ok or will they wear out because of angle?    Not sure if these tubular aftermarket guys are capturing the angle problems and just making the ball joint re-inforced?

 

The aftermarket arms exist for a reason sadly.  Stock or aftermarket stock arms will hate their life on a 2.5" level and not last.  2 inches is the limit and even that can be a touch too much.  

 

IMO I'd get the corrected angle aftermarket arms.  https://www.readylift.com/tubular-upper-control-arm-kit-2017-2018-chevy-silverado-1500-gmc-sierra-1500-1.html

[Pullmeover18]

4 minutes ago, newdude said:

 

The aftermarket arms exist for a reason sadly.  Stock or aftermarket stock arms will hate their life on a 2.5" level and not last.  2 inches is the limit and even that can be a touch too much.  

 

IMO I'd get the corrected angle aftermarket arms.  https://www.readylift.com/tubular-upper-control-arm-kit-2017-2018-chevy-silverado-1500-gmc-sierra-1500-1.html

The readylfit were my first choice until they told me a 1/2 spacer was needed for the front wheels.   Also hope they clear the Eibach beefy coil springs.   I may call readylift and ask if they tried them with those springs because Eibach would not tell me what brand did in fact interfere.