Transmissions in Cummins applications transfer engine power to the drive wheels. They use manual, automatic, or automated designs. Gears and clutches manage torque and speed ratios. Heavy-duty materials withstand high loads and heat. Bearings and shafts provide smooth operation and durability. Hydraulic and electronic controls optimize shifting performance. Cummins matches transmissions to engine output for efficiency and reliability. Proper maintenance extends transmission life and drivability.