2D
The 2D is the most widely used aftermarket transaxle in the recreation vehicle market.
MD5
The MD5 is a medium duty transaxle used alot in class 10 and 12 desert racing classes
S4
The S4 features wide gears and a large reverse. Ideal fo anything from sandcars to race cars.
S4D
The S4D is very similar to the S4, but it has a larger ring and pinion. Designed for the bigger horse power and bigger tires.
HD4
The HD is the largest transaxle on dirt. It has a 13 " Ring and Pinion that will with stand almost anything.