Hey guys, my t-case sprung a leak (rear case and tailshaft housing). Both have been welded up before (previous owner) and doesn't seem to be working anymore. The tag says NP 231D with a Assembly code of 5210 5022AB. I've found NP 231 D t-cases but not with the same assembly number. Are they interchangeable? The truck is my DD and down hard until I can replace it (or find a cover and tailshaft housing). What can I put in there that will work? Thanks a bunch.
