722.9 Transmission parts, repair guidelines, problems, manuals
W7A700, W7X700, W7X550, W7C700, W7C1000, W7B700, K7B1000
Transmission general data
| Number of gears | Transmission Type | Drive | Torque (Nm) | ATF (full capacity) L | ATF (change) L | ATF type |
|---|---|---|---|---|---|---|
| 7 | AT | RWD/AWD | 550-850 | 9,1 | 5 | 236.15 |
The 7-speed automatic transmission Mercedes 722.9 was produced in 2004 (G-tronic) and considered to be a masterpiece from Mercedes Benz for С-class models. It was used for all RWD Mercedes cars from С180 to С350. This transmission was designed on constructive basis of the 6-th series of automatic transmissions and many spare parts are interchangeable.
- W7X550 - for engines up to 3,5L and 550Nm; ATF capacity - 8,6L;
- W7A700 - for engines up to 5,5L and 700Nm; ATF capacity - 8,9L;
- W7B700 - for engines up to 6,3L and 850Nm; ATF capacity - 9,1L.
What are you looking for?
Overhaul Kit | Friction Kit | Friction | Steel Plate | Steel Kit | Band | Solenoid Kit | Solenoid EPC | Solenoid TCC | Pump | Shaft | Drum | Valve body | Torque converter | Hub | Piston | Piston Kit | Planetary Gear | Filter | Gasket | Bushing | Seal | Bearing | Pressure Plate | Stator | Differential | Retainer | Inhibitor Switch | Instruction manual | TOOLS & ACCESORIES | Sensor
Which cars run with this gearbox?
| Brand | Model | Year | Type | Engine |
|---|---|---|---|---|
| Freightliner | SPRINTER | 12-16 | 7 SP RWD | L4 2.2L |
| Infiniti | FX | 16 | 7 SP 4WD | L4 2.2L |
| Infiniti | M/Q70 | 14-16 | 7 SP RWD | L4 2.2L |
| Infiniti | Q50 | 12-16 | 7 SP RWD | L4 2.0L 2.2L |
| Infiniti | Q60 | 16 | 7 SP RWD | L4 2.0L 2.2L |
| Infiniti | Q70 | 16 | 7 SP RWD | L4 2.0L |
| Mercedes-Benz | C-CLASS | 99-15 | 7 SP R/4WD | L4 1.8L 2.2L V6 2.5L 3.0L 3.5L V8 6.3L |
| Mercedes-Benz | C-CLASS | 07-15 | 7 SP R/4WD | L4 1.8L 2.2L V6 2.5L 3.0L 3.5L |
| Mercedes-Benz | C-CLASS | 09-16 | 7 SP R/4WD | L4 1.6L 1.8L 2.0L 2.2L V6 3.0L 3.5L V8 4.0L |
| Mercedes-Benz | C-CLASS | 10-14 | 7 SP R/4WD | L4 2.2L V6 3.0L 3.5L |
| Mercedes-Benz | C-CLASS | 09-16 | 7 SP RWD | L4 2.2L V8 4.0L 6.3L |
| Mercedes-Benz | C-CLASS COUPE | 11-16 | 7 SP R/4WD | L4 1.6L 1.8L 2.0L 2.2L V6 3.0L 3.5L |
| Mercedes-Benz | C-CLASS COUPE | 11-16 | 7 SP RWD | V8 4.0L 6.3L |
| Mercedes-Benz | CLC | 08-11 | 7 SP RWD | V6 2.5L 3.5L |
| Mercedes-Benz | CLK | 04-09 | 7 SP RWD | V6 2.5L 3.0L 3.5L V8 5.0L 5.5L 6.3L |
| Mercedes-Benz | CLS | 14-16 | 7 SP 4WD | L4 2.2L V6 3.0L |
| Mercedes-Benz | CLS | 10-16 | 7 SP R/4WD | L4 2.2L V6 3.0L 3.5L V8 4.6L |
| Mercedes-Benz | CLS | 11-16 | 7 SP R/4WD | V8 5.5L |
| Mercedes-Benz | E-CLASS | 10-16 | 7 SP 4WD | L4 2.2L V6 3.0L 3.5L V8 4.6L |
| Mercedes-Benz | E-CLASS | 02-16 | 7 SP R/4WD | L4 1.6L 1.8L 2.0L 2.2L V6 2.6L 3.0L 3.5L V8 5.5L |
| Mercedes-Benz | E-CLASS | 09-16 | 7 SP R/4WD | V8 5.5L 6.3L |
| Mercedes-Benz | E-CLASS | 09-16 | 7 SP R/4WD | L4 2.2L V6 3.0L 3.5L V8 5.5L |
| Mercedes-Benz | E-CLASS | 09-16 | 7 SP RWD | L4 1.6L 1.8L 2.0L 2.2L V6 2.5L 3.0L 3.5L V8 4.6L |
| Mercedes-Benz | E-CLASS | 11-16 | 7 SP RWD | V8 5.5L |
| Mercedes-Benz | E-CLASS COUPE | 10-16 | 7 SP R/4WD | L4 1.8L 2.0L 2.2L V6 3.0L 3.5L V8 4.6L |
| Mercedes-Benz | E-CLASS COUPE | 09-16 | 7 SP RWD | V6 3.0L 3.5L V8 5.5L |
| Mercedes-Benz | GL-CLASS | 12-16 | 7 SP R/4WD | V6 3.0L V8 4.6L 5.5L |
| Mercedes-Benz | GL-CLASS | 14-16 | 7 SP RWD | V8 5.5L |
| Mercedes-Benz | GLK | 09-15 | 7 SP 4WD | V6 3.0L |
| Mercedes-Benz | GLK | 08-16 | 7 SP R/4WD | L4 2.0L 2.2L V6 3.0L 3.5L |
| Mercedes-Benz | GLK | 11-15 | 7 SP R/4WD | L4 2.2L V6 3.0L 3.5L |
| Mercedes-Benz | G-WAGEN | 97-16 | 7 SP 4WD | V12 6.0L V8 5.5L |
| Mercedes-Benz | G-WAGEN | 97-16 | 7 SP 4WD | V6 3.0L |
| Mercedes-Benz | G-WAGEN | 97-16 | 7 SP 4WD | V6 3.0L V8 4.0L 5.5L |
| Mercedes-Benz | ML-CLASS | 05-16 | 7 SP R/4WD | L4 2.2L V6 3.5L |
| Mercedes-Benz | ML-CLASS | 11-16 | 7 SP R/4WD | L4 2.2L V6 3.0L 3.5L V8 4.6L 5.5L |
| Mercedes-Benz | R-CLASS | 14-16 | 7 SP 4WD | V6 3.0L |
| Mercedes-Benz | R-CLASS | 05-16 | 7 SP R/4WD | V6 3.0L 3.5L V8 4.6L 5.0L 5.5L |
| Mercedes-Benz | S-CLASS | 10-16 | 7 SP R/4WD | V6 3.0L V8 4.0L 4.6L |
| Mercedes-Benz | S-CLASS | 13-16 | 7 SP R/4WD | V12 6.0L V8 5.5L |
| Mercedes-Benz | S-CLASS | 05-14 | 7 SP RWD | V6 2.8L 3.0L 3.5L V8 5.5L |
| Mercedes-Benz | S-CLASS | 10-16 | 7 SP RWD | V6 3.0L 3.5L V8 4.6L |
| Mercedes-Benz | S-CLASS COUPE | 14-16 | 7 SP 4WD | V8 4.6L |
| Mercedes-Benz | S-CLASS COUPE | 14-16 | 7 SP R/4WD | V12 6.0L V8 5.5L |
| Mercedes-Benz | SL | 12-16 | 7 SP RWD | V6 3.5L V8 4.6L |
| Mercedes-Benz | SL | 12-16 | 7 SP RWD | V12 6.0L V8 5.5L |
| Mercedes-Benz | SLK | 11-16 | 7 SP RWD | V8 4.0L 5.5L |
| Mercedes-Benz | SLK | 11-16 | 7 SP RWD | L4 1.8L 2.0L 2.2L V6 3.0L 3.5L |
| Mercedes-Benz | SPRINTER | 12-16 | 7 SP R/4WD | L4 2.2L V6 3.0L 3.5L |
| Mercedes-Benz | V-CLASS | 14-16 | 7 SP R/4WD | L4 2.0L 2.2L V6 3.5L |
| Mercedes-Benz | VITO | 14-16 | 7 SP R/4WD | L4 2.0L 2.2L V6 3.5L |
| Nissan/Datsun | FUGA | 16 | 7 SP RWD | L4 2.0L |
| Nissan/Datsun | SKYLINE | 14-16 | 7 SP RWD | L4 2.0L |
| SsangYong | CHAIRMAN W | 08-16 | 7 SP R/4WD | L6 3.2L 3.6L V8 5.0L |
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- Bearings, brg, Mainbearing
- Cover Bolt, Cover Bolts, Mounting Bolt, Mounting Bolts, Pan Bolt, Pan Bolts, stud, studs, Split Pin
- Chains,
- TCMs, transmission control module, TCU, TCM, Computer, Circuit Board, Control Module, Control Unit, Hardware
- Electrics, Electric, Electronic, Electronic Shift, Electronics, Pin Wiring, Relay Control Switch, Neutral Relay, Main Relay
- Filters, Filter Cartridges, Filter Cartridge, Oil Pan Filter, Inlet, Filter Kit
- Friction Discs, Frictions, fric, Friction Disc, Friction, Friction Plate, Friction Ring, fric., Clutch Plate, Friction Lining
- Gaskets, gsk, gskt, , Cover Gasket, Cover Gaskets, Case Gasket, Case Gaskets, Filter Gasket,Filter Gaskets
- Gasket Pan, Pan Gaskets, Pan gasket, Filter Gasket,Filter Gaskets
- Inhibitor switches, Inhib.Swtch, Range Selector Switch, Selector, Range Switch, Position Switch, Gear Selector, ISM
- ohk, OHK kit, Overhauls, mok, Overhaul kit, Masterkit, Master kit, Master Overhaul, Repair package, Overhaul, Rebuild kit, Master Rebuild, Super Rebuild Bundle, Banner Kit, SUPER KIT, SUPERIOR KIT
- Pans, Crankcase, Oil Pan
- Pistons, Apply Piston, Pack Piston, High Piston, Damper Piston, Piston Damper, Piston Plate, Interm. Servo Pist, Piston Seals, Piston Seal Ring, Piston Seal Rings, Piston Seal, Piston Cover, Piston Covers, Rear Servo, servo piston, Piston Retainer, Piston Retainers, Servo kit, Super Servo, servo, Shift Pison
- Piston Kits, Piston Complete, Piston part, Piston Sets, Piston Set
- Planetary Gears, Planetary Gear Set, Planetary Gear Sets, Planet, Planetary Assembly, Planetary Component, Reaction Carrier, Planet
- Plugs, Plug Adapter, Intermediate Plugs, Intermediate Plug, Bore Plug, Bore Plugs, Valve Bore Plugs, Valve Bore Plug
- Pumps, Rotor, Vane, Vanes, Kit Pump Vane/Ring
- Regulators, Main Pressure Regulator, Main Pressure Reg, Pressure Regulator, Forward Regulator, Secondary Regulator, Pressure Reg, Press Reg
- Regulator Valves
- Seals, Metal clad seal, Lip Seals, Connector Hole Seal, Lip Seal, Main Seal, Radial Lip Seal, Main Seal, Manual Seal, Oil Feed Seal, Side Cover Seal, Seal Cooler, Seal Oil Cooler, Case Seal
- Cap,
- Seal Rings, Seal Ring, Sealing Rings, Piston Seal, S/Ring, SEALING RINGS S/Ring, Accumalator Seals
- Sump modification kit
- solenoid, Shift Solenoid, Kickdown Solenoid, Control Solenoid Support, Solenoid Retainer, Interlock Solenoid, Solenoid Switch
- TCC sol, tcc solenoid, TCC Reg, TCC PWM
- Speed Sensors, Output Sensor, Input sensor, Reluctor, Shaft Sensor, Speed Sender, Sensor Input, Sensor Output, Sensor Input / Output, TURBINE SPEED, INPUT SPEED, VEHICLE SPEED
- Steel Kits, Steel Set Kit, Steel Clutch Plate Kit, Steel kit, clutch steel, clutch steels, Steel set, steel pack, module kit, Steel Plate Clutch Kit, Steel Plate Kit, Steel Plate Module, Steel Plate Set, Steel Module
- Steel Plates, steel, Steels, steel disk
- Washer, Washers, T/Washers, Thrust Washers, Selective Washers, Kit Washer, Drive Sprockets, Driven Sprockets, Drive Sprocket, Thrust Kit, Washer kit,
- Tool kits, Alignments, Alignment, Reamers, Reamer, Tool kit, Tool, Pressure Gauge, Clutch Aligning Tool, Clutch Removal Tool, Clutch Tool Supplement, Kit Installer, Air Test Plate, ADJUSTMENT TOOL, Thread Tap, Remover
- converter, t.converter,
- Tubes, Oil Tube
- Throttle Valve, Timing Valve, Operating, Relief Valve, Safety Valve, Control Valve, AFL Valve, Limit Valve, Actuator Feed Limit Valve, AFL Valve
- VB plate, Valve body plates, Valve body plate, ValveBody, V/Body, valve-body, v body, v-body, v/b, Orifice, Hydraulic control unit, HCU
- Overlap Control Valve Kit, Pressure Regulator Valve, Switch Valve Plug, Actuator Feed Limit
- Oversized Valve, flow control, Oversized Safety, Oversized, Flow Control, Valve pump flow control, Pump flow control valve, Oversized Pump Flow Control
Technical issues and repair guidelines
For this transmission, Mercedes engineers used the controlled slipping of the of the torque converter frictions, which starts from the first gear. In many cases, this peculiarity leads to rapid fluid contamination by the torque converter frictions and premature necessity for fluid change and the torque converter rebuilding.
The whole family of 722.9 transmissions is sensitive to issues with fluid shortages and its contamination. The main spare parts in this transmission are wearable teflon rings, which are crucial for accurate gear shifting. There are two types of friction components for this gearbox- one-sided and two-sided.In most cases, frictions of the K2 package get replaced. The K1 frictions are replaced less often as well as K3 frictions, but repair specialists order a full kit of friction discs in case of burnt oil.
The first typical problem of the 9th series is related to the failure of the connector electronic board - the sensor Y3 / 8n1 gets burnt. In most cases, this board is replaced. The resource of solenoids heavily depends on the oil contamination level and leakproofness of packages.The second common problem of this transmission is the damage of the housing bell caused by vibrations from aggressive driving.
The valve body in this transmission operates at temperatures up to 130º and it is very sensitive to overheated and contaminated fluid and shavings. Small springs of the valve body can break down, solenoids may get clogged. Experts assume that abnormal operation of the valve body leads to shortages of oil pressure in the 722.9 unit, frictions get burnt and other problems occur in the chain order. Since Mercedes engineers provided the valve body repair without the transmission removal, thus it is possible to detect the abovementioned problem and solve it by means of reassembly and cleaning.
Problems also occur in the multi-function switch (Servo mechanism module). Although components of this transmission are quite reliable, but problems in the electrical part have a negative impact on the oil pump and consequently result in issues with the rear planetary gear and bushings.The torque converter repair is one more operation which should become a preventive measure to prolong the service life of this transmission.
Instruction manuals and useful links Suggest your link
| Link type | Source | Description |
|---|---|---|
| www.at-manuals.com | Diagnosis, Repair Advanced Training 722.9 | |
| www | www.at-manuals.com | Electrohydraulic control module 722.9 |
| www | www.at-manuals.com | Solenoid and electronic control identification 722.9 |
| www | www.at-manuals.com | CheckBalls 722.9 |
| www | www.at-manuals.com | Solenoids work 722.9 |
| www | www.at-manuals.com | Scheme 722.9 |
| Sonnax | Valve Body Layout 722.9 | |
| www | mercedesmedic.com | 722.9 7G Tronic Automatic Transmission Problems and Solutions |
| drive.google.com | 722.9 Atra introduction | |
| drive.google.com | 722.9 Information | |
| drive.google.com | TIPS and TRICKS 722.9 |