Originally Posted by BJ's Off-Road
Binding of the drivetrain shouldn't cause it to slow down...
Now if it is a Quadratrac and someone put the wrong fluid in it, chances are the clutches are slipping and burned themselves out which would explain what happened.
So, could be the transmission or could be the transfer case if it is a Quadratrac...
Drivetrain binding will in fact, slow it down, especially on hard, dry surfaces. I have personally experienced this with a number of rigs. Something as small as a soft tire will cause one axle to drag. This is why they installed a diff in the t case.
The t case clutches (cones actually) can't "slip" in the sense your speaking of, only bind, and this problem is most prevalent on cornering and comes in the form of a banging or popping noise as the diff relieves the windup in the drivetrain..