Yes, I should have mentioned the clutch release fork has to be pulled out and the shift tower and transfer case levers have to be removed. A mechanic knows those things have to be removed as well as the drive lines, clutch cable, speedo cable, park brake cable and on and on. Without a manual it's hard to know all the things that are in the way or have to be removed in a certain order or parts will be damaged. The tranny and transfer cases together are over 100 lbs and are awkward so be very careful and rent a tranny jack and four tall jack stands. You will need at least 18" between the frame and the floor and higher is better. �
As Calvin said, buy a manual and it will explain a lot of things. Start with this one
http://www.ebay.com/itm/Jeepster-Shop-Manual-1948-1949-1950-1951-1952-1953-Willys-Repair-Mechanics-Book-/400318092448?pt=Motors_Manuals_Literature&hash=item5d34d154a0&vxp=mtrEDIT: Calvin and I have talked about this a lot and in fact just last week we R&I'ed his tranny. We pulled the bellhousing with the tranny because we had to pull the clutch. I felt it was easier to pull the tranny/transfer cases and then the bellhousing but the committee out voted me. It's a good thing a real strong man was helping us for we didn't have a tranny jack.