Previously, we evaluated the Volkswagen Group's dual-clutch transmission, known as DSG/S-tronic, discussing its issues and distinguishing between dry and wet types, along with detailing which brands and models use which. Today, let's do the same for the Renault-Nissan group's EDC (Efficient Dual Clutch) and Ford's Powershift transmissions. However, it's important to note: Not every Powershift is dual-clutch. Around 2016, Ford began using torque converter transmissions coded 6F15 and 6F30, and by 2018, they almost completely phased out dual-clutch systems.

Both transmission groups are produced by Getrag, and while there are calibration differences, the gearboxes carrying the same code are fundamentally the same. There are a total of six types of EDC/Powershift:

• 6DCT250 – Dry clutch; Renault Clio, Megane, Fluence, Kadjar, Scenic; Ford Fiesta, Focus, B-Max
• 7DCT300 – Wet clutch; Renault Clio, Megane, Talisman, Kadjar, Nissan Pulsar, Qashqai; Ford Fiesta, Puma, Transit, EcoSport
• 6DCT450 – Wet clutch; Renault Megane, Talisman; Ford Focus, Mondeo, Kuga, Escape
• 7DCT400 – Wet clutch; Renault Koleos
• 7DCT500 – Wet clutch; Renault Kadjar
• 7HDT300 / 7HDT400 – Wet clutch; used in hybrid models

The first number indicates the number of gears, while the last number denotes torque capacity (e.g., 6DCT250: 6-speed, max 250 Nm). Moreover, let's note that 7DCT300 has been also in use in Mini/BMW 1 series models since 2018. Depending on the engine, the same models may have different transmissions. General rules are as follows:

• 6DCT250 is the oldest type, found in almost all vehicles produced before 2010 with 6 speeds.
• Renault B and C segment models with engines under 1.6 liters carry 6DCT250 (e.g., 1.5 dCi) if they have 6 speeds, and 7DCT300 (e.g., 1.3 TCe) if they have 7 speeds.
• 1.6 dCi models carry 6DCT450 if they have 6 speeds, and 7DCT300 if they have 7 speeds.
• In Renault’s D segment or SUVs, the transmission varies, but after 2010, most use wet clutches.
• B and C segment Ford Powershift models carry 6DCT250 if they have 6 speeds and less than 250 Nm, 7DCT300 if they have 7 speeds; the rest use 6DCT450.

EDC and Powershift Transmission Problems

1. Dry Clutch (6DCT250)

  - Shuddering: Occurs at low speeds or during starts; caused by clutch wear or calibration issues.

  - Early Clutch Wear: Common in stop-and-go traffic.

  - Overheating: Can lead to transmission failures in heavy traffic.

  - Transmission Control Module Failures: Causes harsh gear shifts.

2. Wet Clutch (7DCT300 and others)

  - Slow Gear Shifts: Delays in gear changes may occur in some models.

  - Transmission Control Unit Failures: Wet clutch systems generally manage heat better, but electronic issues can arise.

  - Fluid Leaks: Can occur in wet clutch systems.

In conclusion, both EDC and Powershift transmissions with dry clutch systems experience similar issues, but as with DSG, wet clutch systems generally perform better. Powershift, particularly in dry clutch models, faces more criticism and problems compared to EDC. Thus, when choosing, it's best to avoid the 6DCT250 when possible.