What is a transmission? Unveiling the different types of transmissions

October 11, 2023

If you’ve ever wondered how your car smoothly transmits power from the engine to the wheels, the answer lies in its transmission system. Both car enthusiasts and everyday drivers should familiarise themselves with the different types of transmissions to fully appreciate their vehicle’s performance, fuel efficiency, and driving experience. In this comprehensive guide, we’ll explore various transmission types, including the traditional manual, the user-friendly automatic, and more advanced types.

The Role of a Transmission

A transmission is a sophisticated mechanical system that converts power generated by the engine into movement of the wheels. It’s the critical junction where engine performance meets wheel action, ensuring your vehicle responds adeptly to different driving conditions.

Different Types of Manual Transmissions

Manual Transmission

The classic manual transmission is characterised by a gear stick and a clutch pedal. The driver is fully in control of gear changes and clutch engagement, facilitating a direct interaction with the vehicle’s power delivery system.

Advantages

High level of driver engagement
Better fuel efficiency with skilled usage
Lower maintenance costs

Disadvantages

Requires considerable driver input
Not ideal for heavy traffic conditions

Different Types of Automatic Transmissions

Automatic Transmission

The automatic transmission is equipped with a hydraulic torque converter instead of a clutch, enabling the vehicle to change gears without driver intervention. Its electronic control unit optimises shift timing, ensuring a smooth driving experience.

Advantages

Ease of use
Suitable for heavy traffic

Disadvantages

Lower fuel efficiency
Higher maintenance and repair costs

Torque Converter Transmission

This automatic system is fitted with a torque converter that replaces the traditional clutch, allowing for dynamic torque multiplication when accelerating from a stop, thereby providing smoother gear shifts.

Advantages

Smooth operation
Better low-speed torque

Disadvantages

Reduced fuel efficiency
More expensive to maintain

Continuously Variable Transmission (CVT)

CVTs operate without gears in the conventional sense. Instead, they continuously vary the transmission ratio, effectively offering an infinite number of gear ratios to ensure optimal engine performance under different driving conditions.

Advantages

Superior fuel efficiency
Smooth driving experience

Disadvantages

May lack the feeling of gear shifts
High repair costs

Advanced Types of Transmissions

Dual-Clutch Transmission (DCT)

The DCT uses two separate clutches for even and odd gear sets. This system enables extremely quick gear shifts, minimising the interruption of torque delivery to the wheels. One clutch disengages the current gear while the other engages the next one almost simultaneously.

Advantages

Quick gear changes
Better fuel efficiency

Disadvantages

Complex and expensive to repair
May be jerky at low speeds

Direct-Shift Gearbox (DSG)

Similar to DCT, a DSG uses two clutches but adds a manual shifting option. It can function fully automatically or allow the driver to manually select gears via paddles on the steering wheel, thus offering a dual experience.

Advantages

Quick and smooth gear changes
Flexibility of manual gear selection

Disadvantages

Complex and high maintenance costs
Reliability concerns

Electronic Variable Transmission (EVT)

This type of transmission employs electronic controllers to continuously alter gear ratios. Often paired with hybrid systems, an EVT can integrate electric motor generators for improved fuel efficiency and a smoother drive.

Advantages

Excellent fuel economy
Seamless driving

Disadvantages

High repair costs
Limited driver engagement

Dedicated Hybrid Transmission (DHT)

Specifically engineered for hybrid vehicles, a DHT allows for the seamless interplay between the electric motor and internal combustion engine, maximising efficiency and performance in hybrid driving conditions.

Advantages

Highly efficient
Ideal for hybrid vehicles

Disadvantages

Limited applicability
High repair costs

Automated Manual Gearbox (AMG)

An AMG system is essentially a manual transmission system equipped with electronic actuators that automate clutch operation and gear shifts. The driver can opt for manual control or allow the system to act automatically.

Advantages

Allows manual control
Easier to use than a full manual

Disadvantages

Not as efficient as a traditional manual
Lacks full manual engagement

Let’s Make Sense of Transmissions Together!

Feeling a bit overwhelmed with all these different types of transmissions? Don’t worry, you’re not alone. Here at Automatic Transmissions R Us, we’re always happy to help. Whether you’re looking to understand the basics or dive into the nitty-gritty details, our team of experts is just a call or click away. If your own transmission is playing up, contact us.

      Excellent rating  
 Based on 278 reviews 
    
  
 
 
      
     
   H S 
 36 days ago
 
 
 
 
    Came here to check my card transmission, very satisfied with the results and they give me good feed back that I need to do, luckily the transmission is no issue so, no charge for that, thanks very much for best service :)
     
   Faisal 
 43 days ago
 
 
 
 
    Ongoing issues with my car others couldn't fix, they sorted first visit, no issues since. Highly recommended 👍👍
     
   markymark9172 
 44 days ago
 
 
 
 
    Cameron and the team are the go to for transmission issues. I could not be happier with the service provided.
     
   Chris Parker 
 72 days ago
 
 
 
 
    I booked the vehicle in for a noise I thought was coming from the gearbox. Graham inspected the vehicle and found it was not a gearbox issue. Graham pointed out other possible faults that could result in the problem i was experiencing. I felt reassured and can highly recommend this repairer who didn't charge me for the diagnosis. Thanks to Cameron and the team at Automatic Transmission R Us a job well done.
     
   George Doneo 
 72 days ago
 
 
 
 
    Trailblazer/ Colorado TC shudder
Had to fight with Holden for many years for a repair for the TC shudder, offered a band aid fix from Holden that failed on two previous occasions.
The team at Transmissions R us were completely honest, as a mechanic in a previous life the explanation of the common problem made sense. (Phoenix Holden constantly denied this issue)
Had the  Transmission  repaired and drove like new, I literally drove the vehicle across Australia towing a boat. After 10 months noticed some slight leaking of ATF on the bell housing. The team repaired the leak that included removal of the Transmission without question.Highly recommend this business.
     
   Darren Ginnane 
 95 days ago
 
 
 
 
    Took my car in recently on short notice when I was informed of a auto trans issue from my normal mechanic. I was met with exceptional customer service and expertise which lead to a quick diagnosis to confirm my true issue which was a crappy ac compressor making the noise.

Will definitely be returning to these guys in the future for any auto trans work.
     
   luke sampson 
 104 days ago
 
 
 
 
    Was just booking in my car,great conversation very up front with the information I needed to know  very helpful
     
   James Taylor 
 107 days ago
 
 
 
 
    These guys are Gold
🥇
They have gone above and beyond both times iv been in the last 3 years. Absolutely saved me, can’t thank them enough ❤️🙏
     
   Deborah Noack 
 116 days ago
 
 
 
 
    I really have to commend Cam and the team. We had presented a challenging scenario for a transmission rebuild, with added insurance dramas. The quality of work, communication and above all honesty was excellent (and unfortunately rarely experienced in other tradey dealings who to try pull the wool over punters eyes – he is no BS - a true professional who takes pride in his craft). We had a subsequent issue that they readily fixed without contension, and spent a lot of time testing and testing to give us the confidence that it would not reoccur. They stand behind the quality of their work.  I never do online reviews, but felt compelled to highly recommend these guys.
     
   Mark O 
 127 days ago