Gearbox Mercedes 722.6

The 5-speed automatic transmission Mercedes 722.6 was first shown in 1996 and almost immediately became widespread on models from many manufacturers. This transmission is capable of handling the enormous torque of V8 or V12 engines.

This series includes: 722.3, 722.4, 722.5, 722.6, 722.7, 722.9, 725.0.

Specifications

Production years since 1996
Type automatic transmission
Number of gears 5
Type of drive all wheel / rear
Engine volume, l up to 3.5 (modification W5A330)
up to 4.3 (modification W5J400)
up to 6.0 (modification W5A580)
Torque output, Nm up to 350 (W5A330)
up to 420 (W5J400)
up to 580 (W5A580)
Recommended oil MB ATF 236.14
Oil capacity, liter 8.7 (W5A330)
9.1 (W5J400)
9.3 (W5A580)
Replacing the oil every 60,000 km (W5A330)
every 65,000 km (W5J400)
every 70,000 km (W5A580)
Replacing the filter every 60,000 km (W5A330)
every 65,000 km (W5J400)
every 70,000 km (W5A580)
Gearbox lifespan, km ~250 000

Gear ratios Mercedes 722.6

Using the example of a Mercedes S-Class 2004 with a 3.5 liter engine:

Main 3.070
1st 3.932
2nd 2.408
3rd 1.486
4th 1.000
5th 0.831
Reverse 3.147

The transmission was installed on:

  • Mercedes C-Class W202 in 1997 – 2000; C-Class W203 in 2000 – 2006; C-Class W204 in 2007 – 2009;
  • Mercedes E-Class W210 in 1997 – 2002; E-Class W211 in 2002 – 2009; E-Class W212 in 2009 – 2012;
  • Mercedes M-Class W163 in 1998 – 2005;
  • Mercedes S-Class W140 in 1996 – 1999; S-Class W220 in 1999 – 2005; S-Class W221 in 2006 – 2013;
  • Jeep Commander XK in 2005 – 2010;
  • Jeep Grand Cherokee WK in 2005 – 2010;
  • Chrysler Crossfire in 2004 – 2008
  • Chrysler 300 in 2004 – 2014;
  • Dodge Charger LX in 2006 – 2010;
  • Dodge Nitro KJ in 2006 – 2011;
  • SsangYong Rexton Y200 in 2001 – 2017;
  • SsangYong Rodius AJ in 2004 – 2013;
  • Jaguar XJ in 1997 – 2002;
  • Jaguar XK in 1996 – 2002;
  • Porsche 911 in 1997 – 2004.

Disadvantages of the Mercedes 722.6 gearbox

  • Until 1999, automatic transmissions often broke down due to a weak bushing between the K1 – K2 shafts.
  • Until 2001, the freewheel of the K1 clutch housing was often destroyed.
  • Transmission solenoids become clogged quite quickly with friction wear products.
  • The torque converter lock-up solenoid valve is usually serviced at 150,000 km.
  • For electrical purposes, the most common replacement is the electrical board with speed sensors.

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