The “automatic gearbox” consists of a set of gears, which may differ from one car to another. These gears or “shifts” are in the form of a group of letters, each with a specific function, such as:
P mode: stands for the vehicle’s engaged position, and is used while the vehicle is completely stationary so it won’t move.
R mode: used to reverse the vehicle.
N position: used to leave the car free without “engagement”, that is, it can be pushed manually when stopped, and it is called “moor”.
D mode: It is used to move the car, change the gear and start it automatically according to the speed.
L mode: It is the mode used on inclines and ascents that require strength in the car’s torque.
In some cars, there are several numbers on the license plate, indicating the number of spare parts that the car is traveling on automatically, such as “1.2.3.4”. Detection method
5. We start the car’s engine and make sure that the “RBM” meter indicator is less than 1, or in other words it is spinning at less than 1000 rpm, and wait a little while until the car warms up.
We move the gear lever to position D and do not press the accelerator pedal. If the gearbox is intact and in good condition, the car will move slowly and the steps will be repeated on all gear positions “DRS1.2.3.4.L.” Of course, the shapes of the letters on the gear plate vary depending on the type of car and country Manufacture and technology used in the vehicle. 4. We move the car for a tour on a highway, and it must go quickly, so that the gearbox shifts the gears from the first gear to the last gear, whether it is the fourth or fifth, depending on the type of car, its engine, its liter capacity and the number of horses.
The goal of testing the car is to try all the gearboxes, regardless of their number, and this must be done smoothly in the process of moving from one gear to another.
3. In the case of using the car’s sport mode, the so-called “spare S”, the car’s acceleration must be stronger than the normal mode, and this is shown by observing the movement of the car, and we feel this when the gear shifts from the first gear to the second gear, when it reaches The RBM meter indicator is set to 2.5 or 3, but in the “S” gear case the indicator goes up to 4 or 5, depending on the driver’s driving of the car.
In the case of trying the “L” mode, it is recommended to drive it on difficult terrain, because this mode depends on the maximum torque of the car, so that it can use only the first and second gears automatically.
2. In the case of the “step tronic gearbox”, which is a double gearbox, with automatic and manual gear shifts, the gearbox lever is placed in the “+” position. – » Accelerating the car and trying all the gears manually, and making sure that each gear is safe.
In some cars, there is a “shift” system, and there are switches on the steering wheel, or in the form of two arms under the steering wheel, responsible for shifting gears manually, and this feature is available in modern cars only.1. In the event of a delay in the gear changes in any of the cases mentioned, the common defect is a piece inside the car fascia called “BODY VALVE” and it is responsible for changing the gear according to the meter reading “RBM”.
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