94 Pete - Rear end shakes

when i was running cheap rubber on my wagon i was always chasing vibrations. cheap tires often may as well be square.

i have all new kelly drives and they will pick up a vibration at certain speeds. barely noticable loaded worse empty and shake your fillings out bobtail. centramatics help a lot

 

a loose yoke in the drivetrain will vibrate, when you let up on the throttle, feels like a u-joint going out

 

Dont forget to check that wheels are centered on hub! thats a big problem for some Trucks

 

Bob beat me to to it!
Years back, I traded off my 2001 W9 with 24.5, for a 2004 W9 with 22.5. I kept my 24.5 wheels and tires, but during the swap, some got mounted off center. Neither truck had a "hop" type of vibration before the swap, so I should have pinpointed the problem, but it took $$$, aggravation, and "Tru Balance" wheel centering gizmos to get my peace of mind back.