i am getting vibration when my truck goes into 5th gear at low rpms. have replaced u-joints but it still does it. in the instructions for my leveling kit it says that the driveshaft may need alterations due to angle/length change? what do you guys think? thanks mike

 

Out-of-balance or out-of-round tire? My '03 had a vibration (very slight) at certain road speeds. The rear rotors had too much run-out. Turning the rotors as part of a brake job removed the vibration. My level kit went on after the brake job. I suspect the level kit would not change the length or the angle of the drive shaft significantly.