So I have a 93 XJ and the 231J t case went out, my friend was parting out his 91 XJ with a 242J t case in it. So I figured the t case swap would work just fine.... I cannot get the darn thing to marry to the transmission. It seems there is a metal ring inside the 242 t case that is not allowing the shaft from the tranny to go all the way in. So I am left with a quarter to half inch gap and she wont go any farther. I put the old one in and she almost fell in. So I am assuming this is the issue. I will post pics when I get a moment but I am all dirty still. Oh and by the way the trannys are the same also. Any ideas? anything would help at this point...