When accelerating or driving uphill, the vehicle's weight shifts rearward, reducing front-wheel traction, causing the transmission to automatically send torque to the rear wheels to compensate. When braking or driving downhill, the vehicle's weight shifts towards the front, reducing rear-wheel traction. The transmission again compensates by sending torque to the front wheels for better steering control and braking performance. If the automatic is placed in reverse or first gear, the transmission divides the torque 50/50 to both front and rear wheels. The manual transmission cars are set up with a near 50/50 torque split as a base setting, and it varies from there. Essentially, manual cars are set up with more bias towards the rear than automatic cars.