I get this vibration through the acclerator pedal at exactly 1500 rpm. This happens in any gear, at any speed, even in park. If the engine is 100 rpm above or below 1500 the vibration is not there. I cant really feel the "noise" anywhere else, like the steering wheel, gear selection lever or 4wd shifter. I've checked the belt driven stuff and everything turns smoothly by hand with the belt off.

Any ideas?

 

Anyone ever had this problem before?

 

sounds like maybe a bad mount or something that is attached to the drive line is touching the body. Check your exhaust hangers for broken rubbers or a fuel line touching the body somewhere.

Rick