VW Dual-Mass Flywheel - Sachs 03L105266CA

A dual-mass flywheel serves as a rotating mechanical device that stores rotational energy as it helps maintain engine rotation in between ignition cycles while also providing a friction surface for the clutch disc and a mounting point for the pressure plate. The Dual-mass flywheel has an inner mass and an outer mass which serve two different functions. The inner mass is synced to the engine's inertia while the outer mass is synced to the transmission's inertia. Internal to the flywheel are springs which act as a damping system and are designed to reduce drivetrain vibrations and allow for smoother clutch operation.

With that said, with age and mileage, a dual-mass flywheel can wear out and develop an issue with the damping system which can cause severe vibrations. If you're experiencing extreme drivetrain vibrations, you may need a new dual-mass flywheel and we also recommend replacing it with every clutch service to prevent future failure.

SACHS Planetary Dual Mass Flywheel

The SACHS planetary dual mass flywheel incorporates the planetary gear and the torsional damper into the flywheel. For this purpose, the flywheel is divided into a primary and a secondary mass, hence the name planetary dual mass flywheel. Rattle and booming noise are now a thing of the past.

SACHS planetary DMF: The advantages for the driver

• Fuel consumption is reduced, since idle speed is lowered and from idle speed, the car can be driven at full throttle.
• High level of acoustic refinement, due to the suppression of annoying rattling and body boom.
• Good refinement even during load reversals, thanks to vibration damping. Jolts are eliminated. Improved operating comfort because fewer gear shifts are required. No unpleasant booming noise that would force the driver to make gear shifts too early.
• Improved gear shift, since lower mass moment of inertia of the clutch disc without torsional damper results in reduced shifting effort.

Features and Benefits:

• Excellent vibrations damping quality through all engine speeds.
• Effortless engine start, short start and stop behavior.
• Good tuning capability thanks to springs in series and spring sets with various stiffness ratings, guided by plastic sliding blocks and spring caps, which keep the springs from going solid.
• Planet gears increase the dynamic mass moment of inertia.
• Grease-filled for long service life.
• Combination of three mechanisms with damping effect:
• Friction (friction bearings, centrifugal force)
• Vibration damping proportional to speed
• Inertia of planetary gear
• No special friction device is needed