The new Cat 966M is 10% more fuel efficient on average than the previous model. We also made changes so you can work more efficiently in a millyard. The lock-up clutch torque converter helps you climb ramps without losing speed, and disc-type differential locks improve traction when the ground is slippery or muddy. Just hit a button and drive right through. Comfort is important, too. The new Ride Control system has two accumulators to chushion the ride full or empty.