What letter represents reverse gear?

[EmilioMarie]

The English letter for reverse gear is 'R'. When the gear is shifted into 'R', the car will move backward. Both manual and automatic transmissions have an 'R' gear. Here are some related details: 1. A typical automatic transmission has 'P', 'N', 'D', and 'R' gears. 'P' stands for Park, 'R' for Reverse, 'D' for Drive, and 'N' for Neutral. 2. Before shifting into 'R' gear, it is essential to ensure the car is completely stationary to avoid damaging the transmission. Similarly, before shifting into 'P' gear, the car must also be fully stopped to prevent transmission damage. Both 'P' and 'N' can be used when parking, but they have fundamental differences: (1) The 'P' gear has an internal locking mechanism. When shifted into 'P', this mechanism locks the transmission gears, effectively locking the wheels indirectly. Without engaging the handbrake, the car cannot move when in 'P'. (2) The 'N' gear does not have an internal locking mechanism. Shifting into 'N' does not lock the transmission gears, so the car can move if the handbrake is not applied. Shifting into 'N' while driving to coast can damage the transmission and is not recommended. When in 'N', the transmission's oil pressure decreases, which can affect lubrication and cooling.