What are the forward and reverse gears in an automatic transmission?

[DeMaverick]

In an automatic transmission, forward and reverse gears are represented by the D (Drive) and R (Reverse) positions. The "R" on the gear selector stands for Reverse, which is used for backing up. The "D" stands for Drive, indicating the forward gear. Here's an introduction to the various gear positions in an automatic transmission: Common automatic transmission gear positions include L, B, P, R, N, D, and S. The L position is the low gear, used when climbing hills to maintain high engine RPM at low speeds. The B position is the brake gear, used when descending long slopes. Engaging this gear activates engine braking, preventing overheating of the brake pads from prolonged use of the service brakes and avoiding potential accidents. The P position is the parking gear. When parking, the gear should be placed in P to engage the parking brake and prevent the vehicle from rolling. The R position is the reverse gear, used when backing up. However, R should only be engaged when the vehicle is completely stopped to avoid severe damage to the transmission. The N position is the neutral gear, used for brief stops such as waiting at traffic lights. The D position is the drive gear, used for normal forward movement. The S position is the sport mode, where the transmission freely shifts based on current speed and throttle input, though with a slight delay in shifting.