I lost 5th gear in my NV4500 about 3 weeks ago... . and I kept driving the truck. On Saturday, I lost 3rd and 4th also so now I need to rebuild or replace. My question is, are the 2wd and 4wd tranies the same in the rear output shaft? I found a very reaonable 2wd trans, but just don't know what all would need to be changed over to make it fit my 4x4. Thanks, CHAD