1999 Dodge Ram steering box

So, what is your question?

If the box is leaking it has to be replaced.

You answered it I think, I was wondering if I could replace a seal are if the whole thing had to be replaced

Do you know on average how much will this cost?

You can buy a remanufactured box for usually around a couple hundred dollars and about the same to install it.

Ok is it possible it could be the seal and would it be ok to just replace it. Are would it be better to just replace the whole thing

Replacing those seals is no easy thing. that one is a whole kit. I suggest changing the box.