RE: automatic transmission
utomatic transmission modes Automatic[/b] Transmissions have various modes depending on the model and make of the transmission[/b]. Some of the common modes are:
Park (P) – This selection mechanically locks the transmission[/b], restricting the car from moving in any direction. A parking pawl prevents the transmission[/b]—and therefore the vehicle—from moving, although the vehicle's non-drive wheels may still spin freely. For this reason, it is recommended to use the hand brake (or parking brake) because this actually locks the (in most cases, rear) wheels and prevents them from moving. This also increases the life of the transmission[/b] and the park pin mechanism, because parking on an incline with the transmission[/b] in park without the parking brake engaged will cause undue stress on the parking pin. An efficiently-adjusted hand brake should also prevent the car from moving if a worn selector accidentally drops into reverse gear during early morning fast-idle engine warmups.
A car should be allowed to come to a complete stop before setting the transmission[/b] into park to prevent damage. Usually, PARK is one of only two selections in which the car's engine can be started. In some cars (notably those sold in the US), the driver must have the footbrake applied before the transmission[/b] can be taken out of park. The Park position is omitted on buses/coaches with automatic[/b] transmission[/b], which must be placed in neutral with the parking brakes set. [/align]
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