It's a durable yet unrefined transmission. It's third gear is a 1:1 so there is no overdrive. It's very dependable and will last a long time, since it's basic design is from the 70's. It also winds the motor at hwy speeds so it'll suffer some mpg. You dont want the dana 35 rear axle with 3.07 gears, you want a dana44 rear axle with 3.73 gears cause you'll need the higher gears when you get bigger tires. Easiest way to tell is look at the fill plug and the diff tag. The D35 is a rubber plug, the D44 is metal, and the tag should say 3.73.