ive got an 86 xj with 4wd and working transfer case, and a 91 xj that needs a new transfer case, in my 86, the transfer case has 2wd, 4wd, N, 4LO. and on the 91 it has all the same and them a 4wd part t ime, will the transfer case from the 86 fit on there? help me please??!?!?!