Here's a working unit and here are some pics and the numbers off of the ring gear. I see no gear ratio as I read them but I did turn the yoke app. 5+ revolutions to one revolution of the drum. It is located in West Plains, Missouri and it should be worth $800 and i'll put it on a pallet but your paying for the ride. Look at the numbers I found on the gear. The plate to plate dimension is 52". There are two sets of spring perches on it and they are 44" and 36.5" from center to center. There are shock plated welded to the housing as well as ladder bar connections. Someone had this thing set up for some serious straight line. Drums and complete brakes at each end of housing. Long stud on the endof axles also. The numbers are this. 173 4 24 75 DANA 36211 A3R36 48-8. There are 43 teeth on the ring gear. Someone may know what these numbers mean.