The AT-1202 model is a two-speed, non-synchronized, twin counter-shaft auxiliary transmission designed primarily for use with heavy-duty transmissions. Stationary applications requiring additional reduction at high torque is also possible.
This auxiliary transmission contains two sets of gears, thus giving the reduction (low) ratio when power is delivered through these two sets of gears. The other speed is obtained by direct (high) drive through the auxiliary.
AT-1202 typical installation in the vehicle is between vehicle transmission and the rear axle. Single mechanical shift bar control or optional 2- or 3-position air control for gear shifting.