Two gears inside my 2000 Nv4500 5 speed went the hell on friday. (67,800 miles) One on the Input Shaft and One on the Counter Shaft. Box Was on 3 under some throttle and the truck made a loud thump then went Away. Did it again a few times the next mile. I Knew something was wrong when down shifting, the stick had a bad vibration. Anyways I Installed the New Usb Bell Turbo later that day thinking the noise was a bad U-joint or tipical dodge front end noise. Took the truck out for a test ride and the noise got worst. Thought it was the clutch. Tore it down to find 2 bad gears. Clutch was on it way out also. Just wondring if anyone has broke some gears under 500 hp (not sled pulling) just street driving. Anyways got a new transmission rebuild and A New SOUTH BEND Clutch out of the deal 
