Cv Angle Measurements

[grimmysnr]

Probably at some point I am going to get the Cognito Leveling kit with all the bells and whistles and install some new keys to go with it. I have the GM SI manuals that dealers use and I am just curious what the actual measurement is to determine is a kit caused failure. In order to prove something I would assume (I know) that you would need numbers including angles in degrees or protractors or something like that. Otherwise it would just be some techs word looking at the angles and being like "Man in my experience that just looks bad". Personal experience doesn't hold up when it comes to the law, numbers do. So I was curious if these numbers were located somewhere even in the GM SI manuals I have so that when I do get around to installing this kit and take measurements I know what I have. So if the angles are slightly over and they are blaming some sort of differential or transfer case failure on the kit and I can say they are full of crap.

[alaska511]

Great idea!

 

[markw8]

This is just speculation, I think anything that alters the the factory delivered angle, could be a problem.

 

Mark

[grimmysnr]

Well yeah I understand this but the question is, what is that angle? There has to be a range or some way to quantify what this angle is. So when it comes to proving something its not a "well that looks about right". Eyeballing something isn't data. Besides any modifications we do to our trucks can pose a problems. Up to and including in channel vent visors, non factory wheels, and ultimately a super charger. All of those items can be construed in some way to be denied warranty.

[alaska511]

I have about 18K on my Cognito/ReadyLift set up.

 

Life is good.

[grimmysnr]

I have about 18K on my Cognito/ReadyLift set up.

 

Life is good.

 

I keep using your truck as a reference whenever I start looking at how I am going to do mine. The stance, ratio, pretty much everything is how these things should look coming from the factory. I will probably change up the wheels but keep the Duratracs just in a different size. I was looking at the Cognito website and it looks like the price may have come down and they are offering kits with fox shocks for 1300 bucks. I remember when I first looked at it just the UCA kit alone was close to if not over a thousand. But in the interest of warranty matters and what not I just want to be an informed customer. I doubt my front end will fall apart moments after the install but if something were to happen I dont want to go in there and let them have at me with nothing in my corner. CV angles are my only real concern and after cranking up the t bars and the angle is nominal compared to stock then I know I wont have any issues in the near future. Obviously, steeper the angle the greater rate of wear. Closest to stock angles the more things will hold up for the long haul.

[greezy]

I cranked my T bars 1.25'' fri and had it aligned. Camber was off so im glad i did. Below is a pic of underneath before and after. Ride did not change.

 

 

[Shatterz]

Probably at some point I am going to get the Cognito Leveling kit with all the bells and whistles and install some new keys to go with it. I have the GM SI manuals that dealers use and I am just curious what the actual measurement is to determine is a kit caused failure. In order to prove something I would assume (I know) that you would need numbers including angles in degrees or protractors or something like that. Otherwise it would just be some techs word looking at the angles and being like "Man in my experience that just looks bad". Personal experience doesn't hold up when it comes to the law, numbers do. So I was curious if these numbers were located somewhere even in the GM SI manuals I have so that when I do get around to installing this kit and take measurements I know what I have. So if the angles are slightly over and they are blaming some sort of differential or transfer case failure on the kit and I can say they are full of crap.

 

Yes there are numbers for what is called the Z height specification for the front torsion bars and suspension height.

 

I have the GM factory literature and will post the pages with this info later on tonight when I get a chance.

[Shatterz]

These pages discuss the trim height of the suspension. The first two pages discuss the trim height adjustment and the measurements to take to determine what it should be on your rig. The last page has the specifications for what the measurements should be.

 

FYI This is from a 09 Service Manual but is applies to all GMT-900s from 07-10.