I recently lifted my 09 double cab 5in in the rear with Alcan rear leafs,and lifted the front 3in fox 2.5's up front with camburg's ball joint uca. Nothing was dne to the driveline. After the lift I noticed there were some harmonics at 55 to 60 mph. I suspect it is the driveline. It was greased which seemed to make it better. Need some input before messing with it. Has this happened to anybody else?
Edit: the truck has almost 60,000 miles