722.9 Planetary, used and ready to install. Fits the 722.9. Ships fast from the USA.
This is a used, original-equipment planetary gearset for the Mercedes-Benz 722.9, the seven-speed automatic Mercedes sold as 7G-Tronic, and the listing references the W204 C-Class. It is for the rebuilder who already has a 7G-Tronic apart and found a carrier with loose or pitted pinions, chipped teeth or worn splines, or for the owner of a C300 or C350 chasing a speed-related whine, a missing gear or a gear ratio fault that keeps coming back after the adaptations are reset. New 722.9 hard parts are expensive and slow to source, so a clean factory gearset is often the practical repair.
The 722.9 makes seven forward speeds and two reverse gears from four planetary gearsets, two of which are combined into a compound Ravigneaux set, plus four multi-disc brakes and three multi-disc clutches. There are no bands and no one-way sprags, so every ratio comes from the control unit holding or driving a different member of these gearsets: a sun gear, a ring gear or the pinion carrier. The layout also lets the transmission skip gears on a downshift, going 7 to 5, 6 to 2, 5 to 3 or 3 to 1. That means the gearsets are loaded in many combinations and the pinions spin at high speed in the overdrive ratios, so wear in a pinion needle bearing or a thrust washer shows up as noise first and as a ratio problem later.
Rule out the cheaper causes first. Most 7G-Tronic shift complaints start in the valve body and solenoids, where hardened or missing solenoid O-rings starve a clutch until it slips and burns, and a whine at the front of early units is frequently the pump bushing or bearing against the converter hub rather than a gearset. Scan the car and save the control unit's stored data before any adaptation reset, then check the fluid level and look at the pan. Steel glitter and thrust-washer material point at the gear train; clutch lining alone points at a slipping pack. Once the unit is apart, spin each pinion on the carrier and feel for roughness, check pinion end play, and inspect the sun and ring splines. Our 722.6 common problems guide walks through the hydraulic wear that also leads to burnt clutches in Mercedes automatics, so you can separate a valve body fault from a hard-part failure.
The listing identifies this part by transmission, the 722.9, and gives a W204 reference, the C-Class generation that used the 7G-Tronic. It does not state which of the four gearsets it is or a single model year. The 722.9 was built from 2003 to 2020 in several torque versions and later updated as 7G-Tronic Plus, so compare the tooth count, spline count and carrier style with the gearset you removed, or send us your year, model and VIN and we will check it before you order. A year-specific version is listed as the 722.9 planetary for 2009, the matching 722.9 sun shell is sold separately, and if your 4Matic noise is coming from the transfer case instead, that unit has its own 4Matic transfer case planetary. Everything else we carry for the family is in the 722 transmission parts collection.
| Fits | 722.9 |
| Part type | Planetary |
| Condition | Used |
| Brand | OEM |
| Reference | W204 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The listing gives a W204 reference and fits the 722.9. Because the 722.9 was built in several versions and has four gearsets, match the tooth and spline count to the part you removed, or send us your year, model and VIN and we will confirm before you order.
It is a used original Mercedes-Benz part. Spin the pinions and check end play before installing, and fit new thrust washers and bearings where the old ones are worn.
Possibly, if the whine follows road speed and you find steel debris in the pan. On early units a front whine is often the pump bushing or bearing against the converter hub, so check that and the fluid condition first.
Worn thrust washers, thrust bearings and bushings, the filter, and the solenoid seals. Clean the valve body and flush the cooler so debris from the failed gearset does not stay in the system.
The Mercedes-approved fluid it was built for: 236.14 on most earlier 722.9 units and 236.15 on seven-speeds built from 2010 on. Do not mix the two.
Yes. Reset and relearn the transmission adaptations with a scan tool that supports the 722.9 control unit, then road test through all seven gears.
