Four speed: Do you want, or make sure that it is / is not an OD unit. Quickets way to tell if it has the shifter properly installed is to look at the front shift lever. If it points down, it's an OD. Alternately, you can wrench that shaft CW which puts the box into 3rd gear if straight through 4 speed, or OD if an OD box. Then turn the input shaft 1 exact turn and watch the main shaft. If it turns LESS than 1 turn, it's a "straight through" 4 speed. If it turns MORE than 1 turn, it's an OD
