When it comes to heavy-duty transmissions, Ford's TorqShift (used in the F-Series Super Duty pickups) and General Motors' Allison transmissions (found in Chevrolet Silverado and GMC Sierra HD pickups) ...

“In 2009, Allison released Vehicle Acceleration Control (VAC), reducing aggressive driver inputs by controlling the amount of engine torque based on vehicle load thus improving overall fuel economy.” ...