722.8 Friction Transmission parts, repair guidelines, problems, manuals
Transmission general data
| Number of gears | Transmission Type | Drive | Torque (Nm) | ATF (full capacity) L | ATF (change) L | ATF type |
|---|---|---|---|---|---|---|
| ∞ | CVT | FWD | 300 | 7 | 6 | 236.20 |
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
Technical issues and repair guidelines
Overhauls of old cars with this transmission usually require the kit of spare parts (gaskets and seals from Autoline) and the kit of friction components. Friction components are replaced quite often in the process of the transmission reassembly, because the 722.8 unit is removed together with the engine, and easily wornout frictions already have a negative impact on the clutch. Driving with worn rings and seals lead to oil starvation and premature burning of quite durable friction components.
The fluid in 722.8 should be changed timely together with filter. The fluid and its purity are critical for cones and belts of this CVT, therefore for old 722.8 units, it is recommended to add the fluid at every opportunity and check its level with a service gauge.
The electrical part always causes a lot of problems in Mercedes transmissions. The board was made by the partnering company of Mercedes and after the warranty period you can face such problems as contaminated fluid (metal dust) and overheating. Steel dust magnetized on sensors lead to their failure.The belt is another vulnerable place in this advanced unit. Mercedes used the belt with additional resource on durability and reliability for its CVT.
Shaft bearings are the first among hard parts to get out of order (like with Jatco CVTs) because of lateral dynamic loads. The end of shaft-cones service life means the end for the CVT unit itself. The lifespan of bearings is highly dependent on the fluid cleanness, and most importantly - on its operating temperature.
Instruction manuals and useful links Suggest your link
| Link type | Source | Description |
|---|---|---|
| www | actronics.eu | Mercedes-Benz Temic VGS (722.8) |
| autogear.fi | Scheme 722.8 |