Feb 2005 ////////Does anyone here know how to recognize a tranny with 4th over?/// What you want is called an Orion box because on the side of the case it is marked Orion. It has a cast iron case. If you are looking at a trans with an aluminum case it is called a SROD and is junk. They are famous for having glass gears (they break very easily even with a stock 6 cylinder!). The Orions are most common in Econolines and F100's and they work well but do have a stretch between gears. I have two of them right now and have used them in all kinds of stuff when I was looking for a cheap overdrive. Hawkrod