Just bought this truck, on the way home at ~30 mph, hit some bumps and the transmission/transfer case levers started violently shaking and banging. I pulled over until it stopped, then took off again and it didn't repeat for 50 miles+. It has a two piece drive line, the spline joining the front to the rear drive lines looks worn. Could it be so worn that it's getting cocked and out of balance? I've never seen such a thing, but don't have any experience with this set up. Any ideas? Thanks,
Ray