722.6 Planetary 1998-2002, used and ready to install. Fits the 722.6. Ships fast from the USA.
If your 1998-2002 Mercedes E320 or E430 (W210 chassis) has a 722.6 five-speed that whines with road speed, has lost a gear, or keeps setting a gear ratio fault after the valve body and solenoids checked out, the problem may be in the planetary gear train itself. This listing is a set of used, original Mercedes-Benz 722.6 geartrain hard parts from a W210: an internal (ring) gear together with the drum and shaft pieces shown in the photo. It suits a rebuilder who has the unit apart and found a damaged ring gear, carrier or shaft spline, and who wants factory metal from the same chassis era rather than an unknown pull.
The 722.6 makes its five forward ratios from three planetary gearsets (front, center and rear), three multi-disc clutches (K1, K2, K3), three multi-disc brakes (B1, B2, B3) and two freewheels (F1 and F2), with fifth gear as an overdrive. In this design the front sun gear is part of the K1 clutch drum, the front internal ring gear rides with the K2 drum, and the rear internal ring gear is snap-ringed into the front carrier shell. The center and rear sun gears sit on the F2 sprag inside the K3 assembly. Every gear change is clutch to clutch, so a ring gear or carrier with worn teeth, loose pinions or a damaged spline does not just make noise; it changes how each shift overlaps and can make the control unit see the wrong ratio.
Before blaming the geartrain, remember that the most common 722.6 faults are elsewhere: the conductor plate and its speed sensors, worn valve body bores, and the leaking pin connector. A slipping F1 sprag is also a known cause of ratio codes on this unit. Our 722.6 E-Class common problems guide walks through each of these.
Check fluid level properly first, then read stored codes and watch input and output speed data per gear. A planetary fault shows a ratio error only in the gears that load the damaged set, while sensor and valve body faults tend to affect shift feel across several gears. Pull the pan: needle bearing fragments and steel debris point to the gear train. The E-Class shift problem diagnosis guide covers how to separate electrical and hydraulic causes.
These parts came from a W210 E-Class with the 722.6, and the listing covers 1998-2002 E320 and E430 models. That matters because the 722.6 used different planetary ratios for four- and six-cylinder engines than for larger V8 applications, and Mercedes changed geartrain tooth counts and the caged needle bearings between them over the years. Count the teeth and splines on your original ring gear and carrier and match them before installing, or send us your year, model, engine and VIN. If you need a different revision, the 722.6 planetary for 2000-2006 and the rest of the range are on our 722.6 and 722.9 parts page.
| Fits | 722.6 1998-2002 |
| Part type | Planetary |
| Condition | Used |
| Brand | OEM |
| Reference | W210 |
| 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 covers an internal (ring) gear with the drum and shaft planetary pieces shown in the photo, removed from a W210 E-Class 722.6. Compare each piece to the photo and to your own unit before ordering.
It came from a W210 E320/E430. Other 722.6 vehicles may use different planetary ratios or tooth counts depending on engine size, so match tooth and spline counts to your original or send your VIN for a check.
Common causes are a failing speed sensor on the conductor plate, a slipping F1 sprag, worn clutch packs, or damaged planetary gears. Rule out the electrical causes before replacing hard parts.
Use an ATF approved to MB 236.14, the current Mercedes specification for the 722.6. Mercedes advises against mixing 236.14 with later 236.15 or 236.16 fluids.
Yes. Inspect and replace worn thrust and needle bearings and bushings, and make sure the needle bearing style matches the geartrain revision you are installing.
