Just had a 5" rough country suspension lift installed and am now running 37" toyo m/t. At highway speeds I'm hearing a rattling sound from underneath almost right where I'm sitting. Is there a mod that needs to be done to the transfer case drive shaft that anyone is aware of? The carrier bearing has been lowered to help with the new angles. If I shift from 2 wd into 4 wd the sound disappears and comes back after I put tit back in 2 wd! Only 72000 mls on my 03 cummins 3500. Anything else that might be making this noise or should I be looking into the front driveshaft?

 

sounds like it might be in the universal am wondering when they pulled the shaft off if the caps came off and some pins fell out cause im thinking when in two wheel drive there is no tension on that u joint but when in four wheel drive there is id also check to make sure all the mounting hardware for the lift kit is tight and nothing was forgotten mistakes happen

 

Just wondering which u jnt are u referring to? Transfer case or front axel? They didn't remove any shafts when doin the lift. Thanks Bud!

 

Are u sure the angles are right now on all the shafts up front.Sounds to me like theres a ujoint binding a little someplace.Jack the front end off the ground so u can spin both wheels and see if u can here anything then.