hey guys i have a 99 4wd cummins 5 speed and im about to have my transmission rebuilt is there any upgrades i can do to the nv4500 while its tore down. i tow small equipment but not alot, well have it chipped pretty soon. ANY SUGGESTIONS?

 

fully splined main shaft, upgraded 5th geat nut, steel tail housing, and they make oil coolers that bolt on where the pto covers are