Hi Guys, Just bought a 06 Dually 5.9 with a vibration at low speed. When I pull off the line it feels like a tire slipping for just a second & then fine the rest of the way up & down. Had it into the dealer & they checked all U-Joints, changed the hanger bearing, serviced the tranny (changed oil ,filter & adjust bands) and no change at all. (Truck under warranty) Any help would be greatly appreciated!! Thanks Dave.