The 4-speed automatic transmission Mercedes 722.4 or W4A020 has been produced since 1981 and was installed on many of the most popular rear-wheel drive models of the German concern. This transmission is designed for engines up to 3.0 liters and 250 Nm of torque.
This series includes: 722.3, 722.4, 722.5, 722.6, 722.7, 722.9, 725.0.
Specifications
| Production years | since 1981 |
| Type | automatic transmission |
| Number of gears | 4 |
| Type of drive | rear |
| Engine volume, l | up to 3.0 |
| Torque output, Nm | up to 250 |
| Recommended oil | DEXRON III or VI |
| Oil capacity, liter | 6.7 |
| Replacing the oil | every 70,000 km |
| Replacing the filter | every 70,000 km |
| Gearbox lifespan, km | ~300 000 |
Gear ratios Mercedes 722.4
Using the example of a Mercedes C-Class 1994 with a 1.8 liter engine:
| Main | 3.230 |
| 1st | 4.250 |
| 2nd | 2.410 |
| 3rd | 1.490 |
| 4th | 1.000 |
| Reverse | 5.670 |
The transmission was installed on:
- Mercedes C-Class W202 in 1993 – 1996;
- Mercedes E-Class W123 in 1981 – 1985; E-Class W124 in 1986 – 1996;
- Mercedes S-Class W126 in 1985 – 1991.
Disadvantages of the Mercedes 722.4 gearbox
- Excellent reliability allows the gearbox to operate up to 200,000 km without any problems.
- The main causes of breakdowns are contamination of the lubricant and severe overheating.
- Most often, the reverse package in automatic transmissions is repaired, in which the springs are destroyed.
- Often you have to clean the hydraulic unit from dirt and change the vacuum modulator.
