I have a small amount of drive shaft vibration on my 1-ton Crew Cab 4X4 at 15 and 35 MPH. I want to lower my transfer case, after I have taken some driveline angle measurements, to stop the vibration. My truck is a long wheelbase Crew Cab 4X4 with a carrier bearing behind the transfer case. I was wondering if just lowering the carrier bearing would do it, or would I need to lower both the transfer case and the carrier bearing? Anybody have any suggestions on this?