Gearbox Mercedes 722.3

The 4-speed automatic transmission Mercedes 722.3 or W4A040 has been produced since 1981 and was installed only on large models of the German concern, that is, from E-Class and above. The transmission was combined with engines up to 6.0 liters and 570 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 6.0
Torque output, Nm up to 570
Recommended oil DEXRON III or VI
Oil capacity, liter 8.6
Replacing the oil every 75,000 km
Replacing the filter every 75,000 km
Gearbox lifespan, km ~300 000

Gear ratios Mercedes 722.3

Using the example of a Mercedes E-Class 1995 with a 3.2 liter engine:

Main 3.060
1st 3.871
2nd 2.247
3rd 1.436
4th 1.000
Reverse 5.586

The transmission was installed on:

  • Mercedes E-Class W123 in 1981 – 1985; E-Class W124 in 1986 – 1996;
  • Mercedes S-Class W126 in 1981 – 1991; S-Class W140 in 1992 – 1996;
  • Mercedes SL R107 in 1981 – 1989; SL R129 in 1989 – 1995.

Disadvantages of the Mercedes 722.3 gearbox

  • This automatic transmission is very reliable and problems appear after 200,000 km.
  • Failures are caused by dirty oil or overheating due to a clogged radiator.
  • More often than others, they repair the Reverse package, in which the springs are falling apart.
  • Often the vacuum modulator in the gearbox is changed or the valve body is cleaned of dirt.

1 thought on “Gearbox Mercedes 722.3”

  1. Hi.
    I have a 1982 Mercedes Benz, model 380 SEC. It has a 722.31002 automatic gearbox, and I would like to change all the ATF oil. Which one should I put on it, Dexron II or Dexron III? What brand and specification would be MB approval? Thank you so much.

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