G56 Transmission Overview Manufactured in Brazil by Mercedes-Benz, the G56 transmission is a 6-speed manual transmission that was designed specifically for light and medium duty diesel trucks. Compared to the NV5600 transmission that it replaces, the Ram G56 transmission is considerably lighter, and shifts smoother thanks to a dual mass flywheel. It can also handle considerably … Continue reading G56 Transmission: Specs, Problems & Where to Buy