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'17 All Terrain w/ Steel Control Arms

Bayou-AllTerrain

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Silvern Sentry Enthusiast

Silvern Sentry

Posted
Posted

With a full suspension lift the arms are kept near their factory angles anyway, so it's not a problem. Any kit that's 2.5-4 that doesn't fully drop the control arms and have new spindles will cause the issue of not clearing the strut. Bds kits for instance work with the stamped steel arms. But any smaller kit won't without replacing the arms

 

 

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Certainly no expert especially on varying heights but I am not certain all kits will maintain all the appropriate factory angles specifially ie) some have more wear and tear. At least this is what I have been led to believe through sources like this.

 

 

last truck Enthusiast

last truck

Posted
Posted

 

The denomonator is (or at least was) if your vehicle build lists premium suspension. There are 3 options, Stock, Offroad tuning (Z71) or premium suspension. ex) High Country and Denali come with premium suspension stock so offroad tuning is not even an available option and they have aluminum. It is also available as an option on other trim lines.

 

My High Country had cast iron control arms

MOhunter92 Enthusiast

MOhunter92

Posted
Posted
The problem with stamped steel arms is the upper control arm doesn't clear the strut if it's lifted more than 2 inches. It's really easy to tell if they are stamped or cast. These are cast, I'm glad my 16 has them. I know rough country said they are coming out with kits for stamped arms, it most likely will include replacement UCAs. /quote]

 

Yep I get that but if I'm buying the kit with replacement upper arms that issue would be solved, right? I guess I'll have to call them tomorrow or Tuesday.

 

Exactly. That's what I believe rough country is working on. I know a lot of shops swap the stamped arms with cast arms to avoid that, not exactly a cost effective fix though. The stamped arms are not necessarily an inferior arm, it's just a cost cut. Gm has put them on some of their vehicles before, it's just too bad that upper arm has significantly less clearance

 

 

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MOhunter92 Enthusiast

MOhunter92

Posted
Posted

 

Certainly no expert especially on varying heights but I am not certain all kits will maintain all the appropriate factory angles specifially ie) some have more wear and tear. At least this is what I have been led to believe though sources like this.

 

 

I have crappy signal so I can't watch the video unfortunately at the moment. Bds kits and others that include new knuckles and full control arm drops do maintain factory angles, they require a good bit of cutting though. That's why many just go with these level kits and cheaper 3.5 and 4 inch kits. The problem with those is the cv angles and lower/upper ball joints suffer because new cross members and knuckles aren't provided

 

 

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Silvern Sentry Enthusiast

Silvern Sentry

Posted
Posted

 

My High Country had cast iron control arms

 

 

Odd from what I know but anything is possible in the year 2106 :)

 

But no really I did not think a HC came from factory with em, maybe different in 2016? Any idea what your build sheet says for suspension? Premium(High Performance)?

 

Edit: Looks like they call it 'High Performance'?

 

HCoptions

Bayou-AllTerrain Enthusiast

Bayou-AllTerrain

Posted
  • Author
Posted

ame="Bayou-AllTerrain" post="1859980" timestamp="1472869549"]

Exactly. That's what I believe rough country is working on.

They offer a kit with arms now that's why I'm confused. The mounting location for the arms shouldn't be any different and you reuse the struts so mounting to the lower doesn't change so what could make the kit not work? Amazing that GM uses 3 different control arms on the same truck. I originally thought all Z71 suspensions used the aluminum arms but obviously that isn't correct.

MOhunter92 Enthusiast

MOhunter92

Posted
Posted

They offer a kit with arms now that's why I'm confused. The mounting location for the arms shouldn't be any different and you reuse the struts so mounting to the lower doesn't change so what could make the kit not work? Amazing that GM uses 3 different control arms on the same truck. I originally thought all Z71 suspensions used the aluminum arms but obviously that isn't correct.

The 3.5 kit has arms available, I don't see why it wouldn't work if the arms are replaced. Yeah there is no rhyme or reason why gm puts what arms on what truck it's really bizarre

 

 

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Bayou-AllTerrain Enthusiast

Bayou-AllTerrain

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Ok just got off the phone with RC, and I'm still confused. They say the issue is that the CV boot will rub the control arm after the lift. I have to assume he meant the lower arm but sure how that's possible. I understand that the geometry will change a bit but can't see how it will rub. Maybe it's the diff drop spacers that will cause this. Obviously they've seen this so I have to trust them unless someone has done this kit before with stamped arms. He did say they are working on a kit but no idea when they will have it.

 

May make a new post asking about the combo and see if anyone has done it on a '16 yet.

MOhunter92 Enthusiast

MOhunter92

Posted
Posted

Ok just got off the phone with RC, and I'm still confused. They say the issue is that the CV boot will rub the control arm after the lift. I have to assume he meant the lower arm but sure how that's possible. I understand that the geometry will change a bit but can't see how it will rub. Maybe it's the diff drop spacers that will cause this. Obviously they've seen this so I have to trust them unless someone has done this kit before with stamped arms. He did say they are working on a kit but no idea when they will have it.

 

May make a new post asking about the combo and see if anyone has done it on a '16 yet.

That's weird.. But yeah I would definitely wait till they have a stamped steel kit. Crazy how gm used 3 control arms on this damn truck within a couple years.

 

 

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