722.6 Clutch Drum 2002, used and ready to install. Fits the 722.6. Ships fast from the USA.
This is the K1 drum, apply piston and clutch hardware out of a 2002 Mercedes-Benz C240 sedan with the 2.6L V6 and the 722.6 five-speed automatic. The transmission was working correctly when it was removed and taken down for parts, so you are getting factory Mercedes internals from a unit that shifted right. It is the part to look for when a W203 C-Class, or another 722.6 with the same K1 drum, slips in the middle gears or came apart with a damaged K1 drum.
K1 is one of three driving clutches in the 722.6, alongside K2 and K3, with brakes B1, B2 and B3 and sprags F1 and F2 doing the holding. The K1 drum carries the K1 frictions and steels and the piston that clamps them. ATSG's application chart puts K1 to work in 2nd, 3rd and 4th, and in reverse when the selector is in W (winter) mode. It is released in 1st and 5th. That makes it one of the busiest packs in normal driving, because a car spends most of its city miles between 2nd and 4th.
Use the apply chart to isolate it from the driver's seat. Slips in 2nd through 4th with good 1st and 5th points at K1. Slips in 1st, 2nd and 3rd instead points at B2 and its shift valve, which Sonnax lists as a cause of a burnt B2 brake. Our C-Class 722.6 shift problems guide covers how to read the codes and log input against output speed. Confirm fluid level and type first, then pull the pan. On the bench, an air-check with new seals tells you whether the drum and piston hold or the drum itself is leaking.
This drum was removed from a 2002 C240 sedan with the 2.6L engine and 722.6 automatic. The 722.6 was produced in several ratio sets and clutch capacities to suit different engine sizes, and K1 plate counts can vary between versions. The safest match is a 2002-era W203 C-Class V6, but compare the drum, piston and spline count with the one you removed before installing. Read the transmission designation on the raised boss on the left side of the case, or send us your year, model and VIN and we will check it. All our 722.6 and 722.9 parts are on the 722 transmission parts page.
| Fits | 722.6 2002 |
| Part type | Clutch Drum |
| Condition | Used |
| Brand | OEM |
| Reference | C240 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Yes. It was removed from a 2002 Mercedes C240 2.6L 722.6 and is listed as the K1 drum with piston and clutch hardware, as shown in the photo.
Per ATSG's apply chart, K1 is applied in 2nd, 3rd and 4th and in W-mode reverse. A K1 problem shows up as slipping in those gears while 1st and 5th stay solid.
Possibly, but the 722.6 came in different clutch capacities for different engines. Compare the drum and spline count with yours, or send year, model and VIN so we can confirm.
MB 236.14 ATF. Mercedes says not to mix it with 236.15 or 236.16 fluids.
Yes. Reset the transmission adaptations with a scan tool so the control unit relearns clutch fill on the new pack instead of using values learned on the worn one.
