722.4 Clutch Module, new and ready to install. Fits the 722.4. Ships fast from the USA.
If your Mercedes 190E, 190D or early C220 with the four-speed 722.4 automatic flares between gears, slips when pulling away, or has gone soft and lazy in reverse, the usual answer once the pan comes off is worn friction plates. This is a new friction clutch module for the 722.4 (factory designation W4A 020): fifteen lined friction plates, five each for the K1 and K2 clutches and the B3 brake, built from US-made friction stock. It is the friction set a rebuilder reaches for when the plates are cooked but the drums and gear sets are still good.
The 722.4 is the small member of Mercedes' four-speed family, the sibling of the larger 722.3. It was first delivered in 1982, rated for about 196 Nm of input torque, and stayed in production until mid-1996. Its ratios are 4.25 first, 2.41 second, 1.49 third and a direct 1.00 fourth, with a 5.67 reverse. Gear changes are made by hydraulically applying multi-plate clutches and brakes against the planetary sets. The three multi-plate packs covered here are K1 and K2, the two rotating clutches, and B3, the multi-plate brake that holds for reverse. Each pack stacks lined frictions between steel plates; when worn lining lets a pack slip, the gear it controls arrives late, flares the engine, or does not hold under load.
These are hydraulic transmissions with a vacuum modulator and adjustable linkages, so a slip is not always a worn pack. Check the fluid level hot, look for a leaking modulator diaphragm (ATF in the vacuum line), and confirm the kickdown and selector adjustments before tearing the unit down. If the fluid is burnt and the pan holds friction debris, the packs are done. Our 722 slipping under load guide explains how to separate a pressure problem from worn plates, and the 722 limp mode guide covers the later electronic units if you are unsure which family you have.
This module is for the 722.4 four-speed only. It was used in the W201 190-series from 1982 to 1993 and in early W202 C-class cars from 1993 to 1996, among other smaller-engine applications. It does not fit the larger 722.3 behind six- and eight-cylinder engines, the five-speed 722.5, or the electronic 722.6 that replaced them; those use different pack sizes. Confirm the transmission number stamped on the case ID plate starts with 722.4, and if you are unsure send us your year and VIN before ordering. Our other 722 parts are on the 722 transmission collection page.
| Fits | 722.4 |
| Part type | Clutch Module |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Fifteen new friction plates: five for the K1 clutch, five for the K2 clutch and five for the B3 brake. Steel plates, bands, seals and gaskets are not included.
No. The 722.3 is the larger four-speed used behind bigger engines and the 722.5 is the five-speed version; both use different packs. This set is for the 722.4 (W4A 020) only. Check the number on the case ID plate.
Mainly the W201 190E and 190D from 1982 to 1993 and early W202 C-class cars from 1993 to 1996, plus some other smaller-engine models. Send us your year and VIN if you are not sure.
Reverse uses the B3 multi-plate brake, so worn B3 frictions are a common cause. Check the fluid level hot and the modulator first; if the fluid is burnt and there is friction debris in the pan, the plates are worn.
Only if they are flat, unblued and unglazed. If the frictions burned, the steels almost always took heat too and should be replaced.
Piston seals, sealing rings, gaskets and the filter at minimum. Inspect the drums, bands and sprag while the transmission is apart.
