I really need someone that is a part guru to look a part number for me. I have a 2006 Jeep TJ 4.0 Automatic. My transfer case is shattered. I ordered a rebuilt SYE one from a guy on EBAY. Told him what Jeep I had (Had not taken old transfer case out yet). He sent me one. I took everything to a mechanic to install. Once the old was removed, the mechanic could not get the speed sensor to drop in to the new transfer case. He noticed that the NPG Part no. was different than the one I purchased. My old transfer case NPG - 45773 and the new NPG No. 49596. As of my search, my number for my old one is right. The new one comes out to be transfer case to a Jeep Liberty 3.7L. Are these two interchangeable? What do you think?