The Fiat C635 DDCT 6-speed dual clutch transmission has been produced in Italy since 2010 and is installed in popular models such as the Fiat 500X, Jeep Renegade, and Alfa Romeo Giulietta. This transmission is equipped with dual dry clutches and a BorgWarner and Magneti Marelli control system.
Specifications
| Type | preselective robotic transmission |
| Number of gears | 6 |
| Type of drive | front / all wheel |
| Engine volume, l | up to 2.4 |
| Torque output, Nm | up to 350 |
| Recommended oil | Tutela Gearforce GL-4 75W-85 |
| Oil capacity, liter | 2.0 1 liter of Tutela CS Speed in the hydraulic system |
| Partial replacement, liter | 1.8 |
| Maintenance | every 90 000 km |
| Gearbox lifespan, km | ~250 000 km |
| Weight, kg | 81 |
Gear ratios Fiat C635 DDCT
Using the example of a 2015 Fiat 500X with a 1.4 turbo engine:
| Main | 4.438 |
| 1st | 4.154 |
| 2nd | 2.269 |
| 3rd | 1.435 |
| 4th | 0.978 |
| 5th | 0.754 |
| 6th | 0.622 |
| Reverse | 4.000 |
Using
The transmission was installed on:
- Alfa Romeo 4C I (Type 960) in 2013 – 2020
- Alfa Romeo Giulietta III (Type 940) in 2010 – 2020
- Alfa Romeo MiTo I (Type 955) in 2010 – 2018
- Alfa Romeo Tonale I (Type 965) in 2022 – …
- Dodge Dart 1 (PF) in 2012 – 2016
- Dodge Hornet 1 (GT) in 2022 – …
- Fiat 500L I (351) in 2014 – 2020
- Fiat 500X I (334) in 2014 – …
- Fiat Tipo II (356) in 2015 – …
- Jeep Compass 2 (MP) in 2016 – …
- Jeep Renegade 1 (BU) in 2021 – …
- Suzuki SX4 2 (JY) in 2013 – 2018
- Suzuki Vitara 4 (LY) in 2016 – 2018
Disadvantages of the Fiat C635 DDCT gearbox
- This isn’t the most reliable robotic transmission, and there are a lot of complaints about it;
- The main problems are caused by the dry clutch unit, which cracks from overheating;
- Bearings in this clutch unit also fail relatively frequently;
- The electro-hydraulic control system can also cause a lot of trouble;
- Hoses are the most common cause of bursting.
