2 August 2019

Advantages and disadvantages of automatic transmission system

The automatic transmission also referred to as full auto gearbox is a completely automated gearbox that self-changes gear ratios as the vehicle moves. It uses three main components such as fluid or hydraulic coupling, planetary gear train and hydraulic controls. A fluid coupling did a quite similar job that what a clutch does in a manual gearbox, which changes gear by locking and unlocking a system of planetary gears that provide the various gear ratios. Hydraulic control acts quite similar to fluid coupling but it is typically a gear pump mounted between the torque converter and the planetary gear and controls the clutches depending on the speed of vehicle running condition. Now let us have a deep insight into the pros and cons gives by the automatic transmission system.

Advantages of automatic transmission system : 

  • This system gives great driving pleasure. 
  • The reduced effort of the driver and more features available to the driver to handle the car. 
  • Better for hilly areas. 
  • Greatly reduced the risk of stalling.
  • Easier to use especially in heavy traffic. 
  • Accurate and effortless shifting of gears.
  • No clutch replacement cost. 
  • To help accelerate quickly. 

Disadvantages of automatic transmissions system : 

  • Expensive gearbox thus not equipped with low car price and the initial cost is high.
  • A fully automatic gearbox means complexity. 
  • Less fuel-efficient because of a lack of control on the torque converter. 
  • Maintainance is costly. 
  • The additional gear train is required for the reverse condition.  
  • Fuel consumption is also higher than a manual transmission. Automatic transmission consumes 10% more than a manual transmission. 
  • Take a longer time to change gear between high and low.
  • Compromise with the mileage.
  • Mechanical efficiency is less.
  • Limited torque capacity.
  • It may not be best suited for off-road driving.
  • Transmission fluid must be transferred every 50,000 km on average.

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