Section 1 (C635 DDCT Automatic Transmission - (Service Information) - 500L): Description: Description

The C635 DDCT is an electronically controlled and automatically shifted transaxle with a dual clutch torque conversion system is a three-shaft transmission capable of transmitting a maximum torque of 350 Nm. It implements innovative technology for combining the comfortable gear shifts of an automatic transmission with lower running costs, better than that of a manual gearbox. By increasing the transmittable torque capacity (which reaches 350 N.m). The features of the new transmission include the possibility of acquiring a highly sporty connotation by optimizing gear shift times and uninterrupted drive torque delivery to the wheels. The C635 DDCT has a typical three-shaft layout for additional compactness. A particularity is that the main shaft actually consists of two mutually coaxial driveshafts. Two dry clutches, operated by two separate slave cylinders, are used to transmit torque to the main shaft. A traditional concentric slave cylinder located under the gearbox casing to manage the even gear clutch and a second one located on the gearbox casing to manage the odd gear clutch. Gears are engaged and the clutches are managed by an hydraulic power unit, controlled in turn by a specific transmission control module. The hydraulic power unit is positioned directly on the gearbox

• 6 synchronized gears
• Three shafts, one input (two piece main) shaft plus counter shafts
• Main shaft formed by two reciprocally coaxial shafts
• Double dry clutch
• Double slave cylinders for the clutches
• Free wheel for reverse engagement
• Hydraulic Power Unit for clutch and gear shift control
• Dedicated TCM