This oddly started happening immediately after I put on new plugs and wires, I think I had a miss, so now I have more power. This is happening all of the time. When I let out the clutch slowly, as soon as I begin to let it out, I get this fairly hard jumping that is transferring to the rear wheels then goes away when I let all the way out and start moving. I suppose it's possible that what I'm feeling is coming thru the clutch pedal but it feels like it's coming from the rear drive. I have a few theories but don't really know enough about clutches, transfer cases, gear boxes and that sort of thing to really guess what it is.