found this on a website selling torsion keys concerning Cv's and keys versus lift kits on CV angle. is this true?

A question that many 4wd owners often ask is wont these keys ruin my 4wd driveline? - The simple answer is no. All of the suspension lift kits made by RCD, Rancho, and some new Fabtech kits use a replacement lift knuckle (aka spindle) that increases the operating angles of the front CVs the same amount as a torsion key lift. These suspension lift kits are well respected and have proven to be extremely reliable and are popular with customers. Vehicles with over 100,000 miles have reported no failures due to the slight increase in CV joint operating angle. PLC believes that the small increase in driveline angle is not enough to cause concern among 4wd owners, however a slight increase in CV boot wear is possible and should be watched.

 

I believe all full suspension lifts address CV angle by means of drop down brackets, new knuckles, etc. Anyone can look at a truck with a suspension lift and see that the CV joints are less than a stock truck with a ton of preload on the torsion bars (by use of OEM or aftermarket keys), unless of course the lifted truck also has the torsion bar preload maxed out. Keep in mind, that information comes from a company trying to sell replacement torsion bar keys.

 

Just about every *real* suspension lift will lower the front axle with drop brackets. This keeps the CV angle fairly close to stock.

I dont recommend the re-indexed torsion keys, as is mentioned, they put the CV joints at a relatively extreme angle. Also, they make the ride pretty stiff, some people wont like it.

my $.02

 

i agree with wandell and johngs 100%. have you ever even looked at a lifted truck?? my CV joints are almost parrallel to each other. yes they use lift spindles....along with drop down brakets. 2wd applications use just spindles but have no CV joints to worry about. i also do not recommend reindexed keys. i would not suggest any more perload than your factory keys allow.