We have a wobble from about 38-40mph.. the steering wheel shakes.. kinda like the death wobble of the k5's.. We've had it aligned numerous times, and it keeps going out of alignment, what could be worn out? does lift and big tires.. bigger than 33's cause this on the ifs trucks? Or are the techs at ntb just stupid and forget to tighten everything up? We put new wheel's and tires on the truck, the wheels and tires were speed balanced.. etc.. and even rotating front tires to rear and rear to front doesn't fix the problem.. Has anyone experienced this on their IFS truck? Eventually we're going to do a SFA conversion.. but right now we want to square away the truck.. any suggestions would be greatly appreciated.. Thanks in advance.. Charles and Pamela.