So im looking into finally lifting my truck and i was wondering if anyone knew how high i could go without causing any front driveline problems, i am wanting to go 11" in the front and 9" in the rear. But i have heard of some guys have front driveshaft vibrations above 8"??????????

 

Anything over 6" is asking for problems. You'll at least need to clock the transfer case and maybe stretch the front driveline, not sure....I won't do a lift that high.