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In an automatic car what are the uses of gears 1 2 and 3 for and when should they be used?
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If you have ever been in wet grass, or stuck in the mud/snow, you can put the gear into the 2nd position and this will give you much more traction and allow you to get unstuck faster. 2nd gear has a lot less torque than first gear. The higher the torque, the quicker the tires will spin and lose traction. If you left it in the drive position, the transmission will automatically start out in first gear. Also when driving through steep mountain roads, when declining down, you have to keep a safe speed. The car is heavy and will tend to go faster and faster the steeper the hill. If you used only your brakes to keep you at optimal speed, they would over heat quickly and you could ruin them. So to help in this situation, you can "downshift" to either 3rd or 2nd or even 1st in extreme cases, and this will cause the transmission to stay in that lower gear, helping to slow you down.
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