Transmission fluid

why does the transmission fluid go in the transfer case on my 96 dodge 3500 diesel 4x4

Not sure what you’re asking!!!

the transmission fluid seeps in my transfer case and then i have to drain it it overfills it

Sounds like a seal between the transmission and the transfer case is leaking. I’m assuming that when you drain the overfill from the transfer case you also have to add transmission fluid. Is that correct?

yes. its got pressure in the transmission and its blowing out all the seals and don’t no why

Changed the seals and so far everything is staying dry 2 seals was bad 1 ok hope it’s solved