SACHS passenger car torque converters
More comfort – less fuel

The torque converter is a key component in any automatic transmission: it aids starting and takes on the job of the conventional clutch by disengaging and engaging the engine and transmission. It is the interaction between the engine with its mechanical kinetic energy and the torque converter with its hydraulic energy generated by special oil that gives the transmission the capacity for automatic driving.

SACHS hydrodynamic torque converters for passenger cars can be adjusted as required to the drivelines of vehicles with automatic transmissions. They guarantee perfect launch behavior and optimum driving comfort, even on poor roads or in traffic jams. What’s more, they provide high dynamics at low fuel consumption.

The combination with a SACHS torque converter lock-up clutch - also called lock-up clutch - boosts these positive properties to an even higher level. The torque converter lock-up clutch consists of a lock-up clutch and torsional dampers. It offsets power losses caused by incomplete torque transmission in the coupling area. Furthermore, it guarantees especially efficient power transmission, prevents wear during the launch process and cuts energy loss as well as noise.

As this video shows, the SACHS torque converter for passenger cars can also be equipped with the new TwinTD twin torsional damper. This advanced damping system minimizes torsional vibrations that increasingly occur in vehicles with modern engines and correspondingly small engine displacement that reach high torques even at low speeds. Thanks to the minimized torsional vibrations with the TwinTD, earlier shift points are possible.

The result: improved driving comfort especially at low engine speeds, and thereby significantly reduced fuel consumption.

Its extremely compact size means the hydrodynamic torque converter for passenger cars packs high performance into a small installation space. Also, the effective cooling capability of the lock-up clutch optimizes heat dissipation and ensures low wear.

Another advantage of SACHS lock-up clutches is their intelligent modular design: A selection from two, four or six possible friction surfaces with different hydraulic circuit diameters enables individual tuning so they can be adapted to meet various driveline designs.

The major components are:

1. Turbine wheel

2. Impeller

3. Stator

4. Torsional damper

5. Brake lining

6. Lock-up clutch

The torque converter for passenger cars is an integral and vital part of an automatic transmission. To ensure it delivers optimal performance at all times, it requires regular maintenance at the recommended service intervals. We recommend changing the transmission oil after 100,000 kilometers to prevent premature wear of the automatic transmission and its components.

For years, ZF has been systematically and successfully involved in remanufacturing. ZF Aftermarket offers remanufactured torque converters for passenger cars as an attractive alternative to new products when a defective converter needs to be replaced. State-of-the-art technology plus extremely rigorous test criteria and development procedures guarantee the transformation of old parts into new quality products that automatically come with a technical update.

This means the remanufactured torque converters represent cutting-edge technology and have the same advantages as new parts in terms of OE quality and warranty.

The starting point of the returning, remanufacturing and reintroduction to the market are the workshops. They play a key role by collecting used parts when replacing them with new parts and by returning them instead of disposing of them.

SACHS products are returned via the CoremanNet system. It’s a fast, easy-to-use system with sorting stations all over Europe that collect and transfer used parts and issue credit vouchers.

• Back-in-box return
  Place the complete used part in a non-dismantled, non-cleaned condition into the original packaging of the new component, ensuring that it cannot leak oil and that it is protected against moisture. It may not show any mechanical damage or severe corrosion damage.

• Collection
  The used part is collected and returned to us.

• Part inspection
  Once the used part has been received, the converter is identified in the sorting station, then tested and evaluated in terms of completeness and damage.

• Credit note
  Soon after the positive part inspection, a credit note to the value of the deposit is issued.

Please contact your sales partner in order to precisely coordinate the return process of your old parts.

Find out more about the CoremanNet System at: