Your vehicle’s automatic gearbox is a dependable hydraulic lift mechanism that sends power from the engine to the wheels. On the gear box or gear shifter for the transmission, each letter and number corresponds to a certain function.
According to Mechanicbase, Automatic transmissions have a gear ratio displayed as a series of numbers on the shifter. A greater gear ratio is indicated by a larger number. More reduction in speed indicates a lower gear ratio.
It’s not quite accurate to refer to each of the letters on the automatic gearbox as a separate “gear” setting. In truth, it’s a toggle switch. In a forward “gear,” an automated transmission’s gears can be switched hydraulically between three and nine different speeds.
A PARK setting is indicated by the “P” on an automatic gearbox. When the park position is selected, the drivetrain “gears” are locked and the wheels are prevented from moving in either direction. The primary function of the park transmission gear is to act as a brake, and this is the way that it is most commonly used. However, for safety reasons, most vehicles also necessitate that the vehicle be started with the transmission in the “PARK” position.
What does the letter “R” indicate or mean?
The “R” indicates REVERSE, the gear used to move the vehicle in the opposite direction of the forward motion. By moving the lever from Park to Reverse, you are engaging the automatic transmission’s reverse gear, which causes the drive shaft to rotate in the opposite direction, thereby putting the wheels in “reverse.” It is quite dangerous to try and start a car in reverse.
What does the letter N mean or stand for?
If your automatic gearbox display shows a “N,” that means the gears are in NEUTRAL and the engine is free to spin at any speed. In this position, both the forward and reverse gears are disengaged, and the tires are free to spin. Only in extreme circumstances, such as when the car’s engine won’t turn over and the driver must push or be pulled, do individuals turn to the N setting.
What does the letter “D” indicate or mean?
As the letter “D” suggests, this is the place to DRIVE. A “gear” in the automatic transmission is engaged at this point. The drive gear transmits engine torque to the wheels and “upshifts” to higher “gears” as the engine speed reaches the target range during acceleration. The automatic transmission will shift down to lower gears when the vehicle’s speed decreases. Many people also refer to the “D” as “overdrive.” In an automatic transmission, this is the highest “gears” setting. This gear is for highway driving or for long excursions where the vehicle’s speed remains constant.
A series of numbers following the letter “D” on an automatic gearbox indicate the gear ratios that can be adjusted manually for forward gear operation, with 1 indicating the lowest gear as well as higher numbers indicating the higher gears. When ascending and descending steep slopes, they can be used to give greater engine braking and as a replacement for ordinary D gear if the latter fails. Increases torque in low-traction situations, such as dirt or sand.
D2: Assists the vehicle in climbing hills or steep inclines, or gives the engine a fast burst in power, just as it does with manual transmissions.
Overtaking is facilitated by using the D3 button, which is also often labeled as an OD (overdrive) button. Because of the overdrive gear ratio, the tires are able to rotate at a greater rate than the engine.
What the L signifies or mean on an A/T.
Automatic transmissions typically feature a “L” as the last letter, which denotes the low driving gear. If you see a “M” instead of a “L,” that means you have the option of shifting the transmission manually. The transmission can be converted to manual mode, allowing the driver to change gears by hand using paddles on the steering wheel or another control (usually to the left or right of the automatic gear lever). This is the mode that L-drivers select while tackling steep inclines or navigating treacherous road conditions like deep snow or slush.
Due to the individuality of each automatic vehicle, the gear change lever may feature a distinct combination of letters and numbers than in other vehicles. Make sure you utilize the right gear for the right situation by reading and reviewing the owner’s manual (often found in the glove box).