Tundra models with the 5.7-liter V8 engine include a tow haul button to the right of the steering column or on the end of the shift lever. Push it any time you need more pulling, stopping, or steering power to compensate for a heavy trailer or load. When you do, the tow haul indicator will appear in the bottom half of the speedometer. When you're in tow haul mode, you'll notice the system holds lower gears longer when you accelerate or decelerate. You'll notice it even more on long grades and mountain roads. Tow haul mode also gives you better engine response and adds engine braking to help it slowing the vehicle down. To turn it off, just press the tow haul button again.