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Some info on CV angles with a 2" level lift.

mnm99

By mnm99
in Modifications & Accessories

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mnm99 Enthusiast

mnm99

Posted
Posted

I figured I'd play around today and see how many degrees a 2" level lift make my 2017 GMC. Attached are pictures stock and 5* after a 2 inch lift. Just throwing it out there for the looking... :)

The first is 5* , 2 inch lift. Second is stock.

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post-169836-0-84270200-1492646612_thumb.jpg

post-169836-0-10426200-1492646621_thumb.jpg

post-169836-0-31073100-1492646602_thumb.jpg

post-169836-0-75770000-1492646608_thumb.jpg

post-169836-0-84270200-1492646612_thumb.jpg

post-169836-0-10426200-1492646621_thumb.jpg

post-169836-0-31073100-1492646602_thumb.jpg

post-169836-0-75770000-1492646608_thumb.jpg

post-169836-0-84270200-1492646612_thumb.jpg

post-169836-0-10426200-1492646621_thumb.jpg

post-169836-0-31073100-1492646602_thumb.jpg

post-169836-0-75770000-1492646608_thumb.jpg

post-169836-0-84270200-1492646612_thumb.jpg

post-169836-0-10426200-1492646621_thumb.jpg

slee3247 Enthusiast

slee3247

Posted
Posted

All I know is I have a 4" front drop and the angles are fine, no binding....just opposite of the way they go with a lift :dunno:

mnm99 Enthusiast

mnm99

Posted
  • Author
Posted

All I know is I have a 4" front drop and the angles are fine, no binding....just opposite of the way they go with a lift :dunno:

Yea, just posting some specs with true degree angles.

GRN69CHV Enthusiast

GRN69CHV

Posted
Posted

Issue isn't the angles of the CV or ball joints at static height, problem occurs at full extension. Full extension is limited by shock extension, this has been discussed here before. That's the big problem with adding spacers , you effectively make the shock longer allowing the suspension to extend further, depending on the amount of lift, putting strain on the ball joints as they approach bind at full extension. Just driving around on good paved roads the suspension will probably never see full extension and everything will be fine. Off-roading is another story. Not sure where you live, but here in PA the exception for over the road driving would be those couple times a year when we get hit with some decent snowfall and have to drive through some snow drifts, very easy to have a suspension go to full travel. I started to look into it and didn't get real far, what's needed on a lifted truck with stock control arms is an upper bump stop to limit extension to factory limits. All things being equal, best front end lift for stock control arms are the Bilstein shocks.

mnm99 Enthusiast

mnm99

Posted
  • Author
Posted

Issue isn't the angles of the CV or ball joints at static height, problem occurs at full extension. Full extension is limited by shock extension, this has been discussed here before. That's the big problem with adding spacers , you effectively make the shock longer allowing the suspension to extend further, depending on the amount of lift, putting strain on the ball joints as they approach bind at full extension. Just driving around on good paved roads the suspension will probably never see full extension and everything will be fine. Off-roading is another story. Not sure where you live, but here in PA the exception for over the road driving would be those couple times a year when we get hit with some decent snowfall and have to drive through some snow drifts, very easy to have a suspension go to full travel. I started to look into it and didn't get real far, what's needed on a lifted truck with stock control arms is an upper bump stop to limit extension to factory limits. All things being equal, best front end lift for stock control arms are the Bilstein shocks.

I'm still confused how shocks will over extend when the stock suspension HAS bump stops. It could never go past them...

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post-169836-0-48710700-1492735496_thumb.jpg

post-169836-0-48710700-1492735496_thumb.jpg

post-169836-0-48710700-1492735496_thumb.jpg

GRN69CHV Enthusiast

GRN69CHV

Posted
Posted

I'm still confused how shocks will over extend when the stock suspension HAS bump stops. It could never go past them...

 

I'd have to revisit this, don't have time to search it at the moment. IIRC, mine didn't have a rubber bump stop top limit extension, others that posted didn't have it either. I don't know if the rubber stop is particular to a package or not. There were pics posted on the site while back that showed it the same as mine, just the metal stop, at full extension, upper control arm wasn't hitting that stop. I thought the same thing and just assumed the stop limited extension regardless, but was proved wrong once looked into it. Intrigued now, will probably crawl under the truck again and have a look.

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