shaft. replaced it. then ate the ring gear light wheeling in sedona ,the D30 is weak. Where i live i did alot of snow wheeling and drove the truck as a DD. I did it to my frontier and its a little heavier . i Ran 33x12.50's open front and LSD in the rear.
It seriously lasted all of a few months under my truck untill i went with a waggy 44. and later upgraded to a fullsize 44. Do what ever you want but the d30 isnt worth the time of day.