Well today I installed MileMarkers part time kit(#501) in my NP203. Everything went together fine, didnt loose any of the needle bearings on the install. When I backed out of the driveway there was a good clunk in the drivetrain. When I drive it around town and I come to a stop it clunks again. Then it clunks when I drive off. I let my foot off of the brake pedal to take up some of the shock, but there still is a clunk. Could the driveshaft be shot? We checked it today after the install and it seemed tight. The instructions for the MM kit say that you should have some play in between .010-.050 how do you check this with a feeler guage? We had almost no play at all, barley moved. Think it could be shot tranny mount or motor mounts? Thanks guys.