i found this and wanted to share with all who might want or need to fix the 5th gear problem. http://dodgeram.info/tsb/1998/21-10-98a.htm
A friends 01 dodge just lost 5th. It comes and goes. Plan is to just tighten nut then put a spot weld on.
reason i found it was i got a salvage yard 4500 tranny. has a small hole in back cover. wanted to make sure i wasnt opening a big can of worms when i remove it to have it tiged back shut. i think i will weld the nut in a spot or 2 when its off so i dont have that problem.
