The John Deere 844J wheel loader is powered by an efficient, electronically controlled, 12.5-liter John Deere PowerTech diesel engine. The engine features wet-sleeve cylinder liners for engine cooling. A key feature of the 844J is its Powershift transmission, which provides smart-shift technology. By continuously sensing speeds and loads, and adjusting clutch pressures accordingly, the transmission delivers smooth shifts without any delay. The braking system is comprised of outboard wet multi-disc brakes that self-adjust for wear to maintain excellent response.