Valeo Dual Mass Flywheels (DMF) Transmission Systems for Passenger car

Dual Mass Flywheels (DMF)

What is a dual mass flywheel?

A dual mass flywheel or DMF is designed to help smooth out the torque produced by an engine by increasing the kinetic energy stored on the input shaft side of the gearbox.

Boosting vehicle efficiency and driver comfort

The dual mass flywheel provides smoother and easier gear changes by filtering out vibrations between the engine and gearbox. Thanks to two independent flywheels connected via a bearing or bushing, including a damper system, a DMF protects the gearbox and the rest of vehicle against engine vibrations, improving driving comfort.

Valeo’s inner damper solution

At high engine speeds, the centrifugal load pushes the springs against the spring guides and creates friction, reducing the active number of coil springs, increasing the effective spring stiffness and reducing filtering capacity. In a Valeo DMF with inner springs, small straight springs are integrated into the drive plate which allow it to filter vibration.

Innovative tech for long travel

For demanding applications, such as RWD vehicles, it’s important to obtain a low level of vibration at the gearbox. To do this, Valeo’s Long Travel Damper (LTD) technology is integrated into the DMF, reducing perceived vibration and engine noise.

The future in transport

The LTD DMF represents a major step forward in powertrain filtration technology. DMFs will become an essential component in tomorrow’s high-performance engines, fuel-saving engines and hybrid powertrains.

Added values

A bold Expertise enabling Valeo to mastering of all DMF technologies


Two sets of curved springs between the flywheels absorb the engine vibration.  Curved springs are valve steel quality and can resist to very high stress during wide angle compression when filtering.

With Inner Damper:

In addition to the two long curved springs, small straight springs, less sensitive to the centrifugal load, are integrated in the drive plate. Perfect for extremely demanding applications such as rear wheel drive vehicles to ensure very low vibrations at gearbox entry level.

With L.T.D (Long Travel Damper):

Two sets of three springs are operating in series and synchronised by a back plate. This combination provides optimal filtration thanks to a maximum angular displacement. Perfect for high-performance engines as well as for hybrid power trains.

Choose Valeo : 

Designed for long lasting performance

  • High-grade “best-in-class” spring wire used
  • Long-life ball bearings and bushings 
  • Added friction damping system design is stable for life 

Specifically designed for each vehicle application

  • Tuned with low stiffness for maximum noise reduction
  • Optimized filtering performance for “rattling” and “booming” issues
  • Applications from 200Nm up to 500Nm torque engines

Improved driving comfort

  • Improved gear shift comfort and gearbox synchronizer durability by reduction of clutch disc inertia
  • Fuel consumption reduction is achieved by driving at lower speeds due to excellent noise reduction

Technology / Innovation

Valeo O.E. Quality maker since 1923

• Valeo is O.E. and O.E.S. partner of most car manufacturers.

• With 95 years of O.E. expertise in friction material engineering and production, Valeo certifies outstanding DMF performance thanks to best-in-class friction materials.

• Valeo DMF technologies ensure an excellent driving experience with 100% torque transmission, high filtration of vibration and an improved shifting comfort.

Choose Valeo

Dual Mass Flywheel Range: choose quality and comfort, choose Valeo!

FullPACK DMF: ALL-IN-ONE solution

Valeo Kitting Offer for both hydraulic or mechanical bearings

• Easy to order: A FullPACK DMF is composed of the DMF, the disc, the cover, the bearing (either hydraulic or mechanical) and the screws. No components mismatching risk.

• Easy to stock: all components in one single box

• Easy to fit: no additional specific tools needed, all parts included.


KIT4P conversion kits

The aftermarket economical solution for demanding applications

• KIT4P replaces standard fit DMF by using a solid flywheel and a LTD system in  the clutch friction plate

• The solid flywheel durability provides excellent thermal resistance and full engine and gear box protection.

• The solid flywheel has no wear parts: no need to replace the whole clutch system a second time over vehicle lifetime.

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