Weird manual tranny slip?

88 Ranger, 5 speed. When I take off from a stop or change gears everything is fine for a few seconds. Shortly after releasing the clutch pedal all the way the truck begins to lurch as if I’ve hit a patch or five of ice. This happens mostly after the engine is warm. Also happens in gears 1 thru 4. Haven’t tested 5th gear. Are the bands slipping? Tranny? Rear end? any ideas would be great… Thanks!

[b]That sounds like a slipping clutch.

Tester[/b]