Torque AT THE REAR WHEELS. It can be achieved in the engine build, in the rear end gears, and to a point with the torque convertor by altering the stall speed; most often a combination of all three- usually gears, TC, then engine; in that order.
Think of the torquiest thing you can, let's say a medium-duty farm tractor. Can pull anything. Torque. How do they get away with using, say, a 40 hp motor? Gears.