I just bought a 2007 nissian titan with a 6" lift and 35" tires on it. The problem is when i accelerate the drive shaft hits the bottom of the cab. Also when i come to a stop I swear the rear end drops like it is on a bind. I can take off fast and the driveshaft hits the cab but then let off the gas and the rear end makes a pop noise and all is good until i stop again. I tried the helper springs for axle wrap thinking maybe would help but no go. It is getting really annoying. Thanks for the help.