Designed for commercial and pleasure applications the Tonanco range of transmissions are built in Japan and are of a very strong and sturdy construction with many ratio options. These heavy duty transmissions are of the countershaft design, so that the units can be operated continuously in either forward or reverse within their full rated capacities. TransDiesel holds a comprehensive parts inventory for servicing these transmissions. Tonanco provide a cost effective repower option for older Twin Disc Marine Transmissions.