The 6DCT450 (MPS6), 6DCT470 (SPS6), and SST (W6DGA) are all types of automatic transmissions that use two separate clutches, which makes them known as dual-clutch transmissions.

• The 6DCT450 (MPS6) is a 6-speed transmission that uses a wet clutch, meaning the clutch is bathed in a lubricating fluid. This type of transmission is used in various car models from manufacturers like Ford, Renault, Volvo, Dodge, and Fiat. It’s a complex piece of machinery and needs regular maintenance, including changing the transmission oil and filter every 30,000 kilometers.
  

• The 6DCT470 (SPS6) is similar to the 6DCT450 but can handle slightly more torque, up to 470 Nm. While it shares many components with the 6DCT450, it has a different internal layout. This transmission is often found in Japanese cars like the Mitsubishi Galant Fortis, Lancer, and Outlander.
  

• The SST (W6DGA) is another version of these transmissions. It’s commonly used in Mitsubishi’s sporty Lancer EVO and Ralli-Art models. Like the others, it also uses a wet clutch design.
  

These transmissions are known for their smooth gear changes and continuous power delivery during gear shifts. However, their complex design can make them more challenging to maintain.