The DSG gearbox uses two separate clutches for odd and even gears, allowing for faster and smoother gear changes.
Not long ago, if you were looking to buy a new car, you had two options for the gearbox: manual or automatic. Nowadays, there is another option for transmission that you may want to think about – the Direct Shift Gearbox, which is often referred to as DSG and is a type of dual-clutch gearbox.
As a driver, you may not be able to tell the difference between a DSG gearbox and an automatic from the driver’s seat. This is because the controls are almost the same and a DSG shifts gears just as smoothly as a regular automatic gearbox.
What Are The Differences Between A DSG And A Standard Automatic Transmission?
The DSG gearbox is designed to function as two separate gearboxes that are connected to the engine through two drive shafts. The vehicle has two gearboxes and two clutches, which are operated by a mechatronics system using hydraulic power. (effectively a combination of mechanics and electronics).
In a typical automatic transmission, the engine’s power is transmitted to the gearbox through a torque converter. On the other hand, in a manual transmission, the clutch is responsible for this task. A torque converter provides seamless gear shifts, but it employs a dense hydraulic fluid that is not as efficient as a clutch-based system.
The DSG has one benefit over a traditional automatic transmission: it can predict which speed you’re likely to want next and will get it ready for use. This enables quick and seamless speed adjustments. An electronic transmission control device utilizes data from the motor speed, road speed, accelerator location, and driving mode to choose the best gear and decide the best shift point.
Although some manufacturers’ systems are quicker than others, each adjustment can be made in less than four-hundredths of a second.
Cost of DSG Transmissions
While some vehicles can only be purchased with a DSG gearbox, this choice is typically more expensive. Naturally, prices vary between automakers, but as an illustration, Volkswagen costs an additional R30k (more or less) for a DSG gearbox on a Volkswagen Golf hatchback.
There aren’t many differences in speed and efficiency between manual and DSG gearboxes. DSGs do have a tendency to be a little bit bulkier than their manual equivalents, which may result in slightly less fuel-efficient vehicles.
If we use the Golf as an illustration once more, the 110kw 1.5-liter TSI petrol variant with a manual transmission achieves fuel economy ratings between 44.8 and 47.9 mpg while the same vehicle equipped with a DSG achieves ratings between 42.8 and 44.1 mpg. Their relative CO2 emissions rates are nearly equal, at 119g/km and 118g/km. Additionally, their 0-62 mph speeds are the same.
When you’re driving a car that has a DSG transmission, it operates a bit differently than a traditional automatic or manual transmission.
As our roads get more crowded, many drivers are finding that driving a car with a manual gearbox is becoming less attractive. This is especially true if you have to deal with a lot of stop-and-go traffic, where constantly using the clutch can become tiring and frustrating.
Driving a car with a DSG is essentially the same as driving a traditional automatic, even though the mechanical processes involved are quite distinct.
A DSG-equipped car operates with just two pedals – the accelerator and the brake. Similar to a traditional automatic car, a DSG car typically has Park, Reverse, Neutral, and Drive settings. To switch between these different drive modes, you usually need to press the brake pedal.
When driving a DSG car at low speeds, it behaves similarly to an automatic car. This means that when you take your foot off the brake pedal while in Drive or Reverse, the car will slowly move forward or backward. This helps in making tasks like parking the car in and out of spaces less difficult.
Many newer cars with DSG transmissions have a manual mode option that lets you take control of the gear changes instead of relying on the computer to do it for you.
When you’re driving on steep hills or need to overtake, it’s a good idea to switch to lower gear. To do this, you can move the gear lever to the left and then shift it forward or backward to choose the gear you need. Some cars have paddles behind the steering wheel that allow you to change gears by pressing plus and minus buttons.
However, it is important to note that not all cars have the same control patterns. Therefore, it is beneficial to familiarize yourself with the system.
What Issues Can Arise With DSG Gearboxes?
Although no mechanical system can guarantee 100% protection against failure, it seems that the use of DSG transmissions by manufacturers has resulted in a very low failure rate. Some owners of older models have reported issues with DSGs, such as noisy bearings or juddering from the transmission. However, these problems are not very common.
Since DSGs are completely automated, they are less susceptible to misuse compared to manual transmission. If the driver is not careful, they could damage the gears or wear out the clutch too soon when using a manual transmission.
Which Car Manufacturers Have DSG Gearboxes?
The Direct Shift Gearbox has become quite popular in Volkswagen Group cars and is now commonly used in VWs and Audis. Many other manufacturers have similar transmissions to DSG, but they may be called something else.
Some BMW models, particularly high-performance ones, use a type of gearbox known as DCT (previously named SMG). Porsche also has a similar type of gearbox called PDK, while Ford refers to theirs as Powershift gearboxes.
