Random vibration

[gen3usa]

Originally Posted by Gumby

at that speed and bench n bed moving, its the rear tires. just cause they were balanced doesn't mean they checked the rim run out. 1 good pot hole can bend a rim.

I thought that about my stockers, so bought new wheels and tires, still there, highly impossible that the new ones are bad too and create the same vib. all of your suggestions are great. My rig is 2x4 so the transfer case issue i can rule out. i honestly think its either the driveshaft or yokes, after reading the sheets posted from Keith I can see how time can create bad shaft angles with run down joints.