The standard for the 3600 3/4 ton was 4:57 according to my handy dandy factory spec manual. You could order a 5:14 if you were planning on pulling some really big stumps. The one ton came standard with the 5:14 and the big boys had 5:43s and even a 6:17. With a 6:17 all you would need is a blade to make it a bulldozer.