T-20 Transmission

Smooth, Efficient and Effective – Mudd-Ox ATVs use the Borg-Warner designed T-20 skid-steer unit, which was concieved specifically to meet the needs of amphibious ATVs by enabling all-wheel drive.  This compound epicyclic-geared steering system does not rely on differential slip, allowing independent control of power and torque, port and starboard, enabling true all wheel drive with efficient transfer of torque and low braking losses.  The T-20 transmission is unique to the Mudd-Ox range and beats anything the competition can do hands-down.

The transmission consists of two similar but symmetrically opposite transmission halves separated by a center plate. Many components are identical in both halves. Sun gears, pinions, carriers, ring gears, and shift collars are identical in both halves. Transmission housing, shift levers, and brake bands are similar but symmetrically opposite.

A shift collar splined to each output shaft is moved in our out by external diamond shaped levers to engage either the ring gear or carrier hub splines. The output shaft is locked to the carrier drum when forward is selected. The ring gear drum is locked to the output shaft when reverse is selected.

Each transmission half may be individually controlled by a selector which permits either selecting forward (F), neutral (N), or reverse (R). Each transmutation half has a “u” channel brake lever which is used to control two bands. The two bands in each transmission half are applied or released as required to cause neutral, driving, or braking as required.

This highly capable steering system offers:

• Truly Independent Control – the T-20 is two mechanically distinct transmission systems, one for the right side and one for the left. This allows smooth turns, even from a standing start without uncontrolled transfer of power from one side to the other.
• Tight, Low-Power Turns. Precision traction control without power bleed and associated surface-tire damage.

The importance of full-time, non-differential, six-wheel drive cannot be overstated, key benefits include:

• Full-time drive to all wheels regardless of the surface traction on each wheel – all wheels drive whether any or all of them are on mud, snow, ice or fresh air.
• No uncontrolled transfer of power between port and starboard wheel sets – a feature that results in “self-steering” in difficult conditions with lesser vehicles.
• No torque loss when steering – differential steering results in a 50% torque loss when steering, requiring a low gear range to compensate and poor low-speed agility.
• Low shock loading of the drive train – unlike differential steering which doubles the speed to the drive train whenever steering is occurring.

 T-20 Transmission

The T-20 Skid-Steer transmission provides unparalleled traction, mobility, and maneuverability. Try one and see the difference that non-differential steering and drive can make…