722.6 Clutch Module 2004, new and ready to install. Fits the 722.6. Ships fast from the USA.
When a 2004-or-later Mercedes C-, E- or CLK-class, a Chrysler 300 or Crossfire, or another car with the six-cylinder 722.6 / NAG1 five-speed starts slipping, flaring between gears, or throwing a gear ratio fault and dropping into limp-home mode, the clutch plates are usually where the teardown ends up. This is a new friction clutch module made in the USA by Alto, part number 141752C, listed for the 722.6 / NAG1 in its W5A 330 form from 2004 on. A friction module is the full set of friction plates for the transmission's clutch and brake packs, packaged together so you are not sourcing plates one pack at a time.
The 722.6 has no bands. Every one of its five forward gears and reverse is made by applying a combination of multi-plate clutches and multi-plate brakes, with the conductor plate solenoids and valve body deciding which packs get pressure and when. Inside each pack, lined friction plates alternate with steel plates; when the piston squeezes them together the pack locks a shaft or drum, and the friction lining is what lets that happen smoothly instead of with a bang. As the lining wears thin or glazes, a pack needs more time and more pressure to lock, and the transmission controller sees the ratio change take too long. Mercedes built the 722.6 in two cores: the W5A 330, rated for about 330 Nm of input torque and used behind four-, five- and six-cylinder engines, and the larger W5A 580 for V8, V12 and later turbo-diesel applications. This module is the W5A 330 version.
Do not buy plates on a code alone. Chrysler issued bulletin 21-033-14 for 2012 NAG1 cars that set an erroneous P0730 and hung in gear when hot, and the fix was a controller flash, not a rebuild. Check fluid level hot, scan for speed sensor and solenoid codes (a failing conductor plate causes limp mode with healthy clutches), then drop the pan. Heavy friction material on the magnet and in the filter confirms pack wear. Our 722.6 common problems guide covers how to separate valve body flare from slipping clutches, and the E-Class shift problems guide walks through the diagnosis on the most common car.
This module is listed for the 722.6 / NAG1 W5A 330 transmission from 2004 on. That year range matters: we list separate modules by year and core, and an earlier unit should be matched against its own listing, such as the 2000-2006 clutch module. A W5A 580 behind a V8 or V12 is a different, heavier pack set. Read the transmission number on the case ID plate, compare it with Alto 141752C, and send us your year and VIN if you are unsure. All of our 722.6 parts are on the 722.6 / 722.9 collection page.
| Fits | 722.6 2004 |
| Part type | Clutch Module |
| Condition | New |
| Brand | Alto |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is a friction clutch module: the friction plates for the transmission's packs. Reuse steels only if they are flat and unburnt; if the old frictions cooked, replace the steels too.
Probably not. This module is listed for the W5A 330 core used with four-, five- and six-cylinder engines. V8 and V12 cars, and later turbo-diesels, use the W5A 580, which takes a different pack set. Check the case ID plate or send us your year and VIN.
Limp-home in second is often electrical, from a conductor plate speed sensor or solenoid fault, and clutches may be fine. Scan for codes and check the fluid before buying plates. Worn clutches show up as slipping, flare and friction material in the pan.
Piston seals, sealing rings, gaskets and the filter at minimum. Most rebuilders do the seal kit with the friction module, and inspect drums, the sun shell and the sprag while the unit is apart.
Yes. The controller has learned fill times for the old, worn plates. Reset the transmission adaptations with a capable scan tool and drive the car through all gears so it relearns on the new plates.
