Mercedes-Benz Transmission
722.3
The Mercedes-Benz 722.3 is a 4-speed automatic transmission with hydraulic shift control.
- Years
- 1979–1996
- Speeds
- 4
- Control
- Hydraulic
- Max torque
- 392 N·m
The big 4G-TRONIC — Mercedes-Benz’s hydraulic four-speed for six-, eight- and twelve-cylinder cars.
Introduced with the W126 S-Class in 1979 as type 722.3, the W4A040 (and later W4A040 II) replaced the earlier three- and four-speed automatics with a stronger hydraulically shifted four-speed rated to about 392 N·m. A related W4A028 variant served G-Class and other off-road applications. Controls are mechanical and pneumatic — no torque-converter lock-up — and many cars are calibrated to move off in second gear for a smoother take-up.
It backed everything from the W123 280 E to the R129 500 SL and 600 SL, the W124 500 E and the W140 S-Class V8s. From the mid-1990s the electronic 722.6 5G-TRONIC took over, but enthusiasts still rate the 722.3 among Mercedes-Benz’s most durable automatics.
Versions.
Every factory version of the 722.3.
| Version | Classification | Max torque | Applications |
|---|---|---|---|
| 722.300 | W4A040 | 392 N·m (289 lb·ft) | W123 |
| 722.303 | W4A040 | 392 N·m (289 lb·ft) | W123 |
| 722.308 | W4A040 | 392 N·m (289 lb·ft) | W123 |
| 722.309 | W4A040 | 392 N·m (289 lb·ft) | W123 |
| 722.315 | W4A040 | 392 N·m (289 lb·ft) | W123 |
| 722.350 | W4A040 | 392 N·m (289 lb·ft) | C126, W126 |
| 722.351 | W4A040 | 392 N·m (289 lb·ft) | W126 |
| 722.353 | W4A040 | 392 N·m (289 lb·ft) | R129 |
| 722.354 | W4A040 | 392 N·m (289 lb·ft) | W124 |
| 722.355 | W4A040 | 392 N·m (289 lb·ft) | W126 |
| 722.358 | W4A040 | 392 N·m (289 lb·ft) | W124 |
| 722.359 | W4A040 | 392 N·m (289 lb·ft) | W124 |
| 722.361 | W4A040 | 392 N·m (289 lb·ft) | W126 |
| 722.365 | W4A040 | 392 N·m (289 lb·ft) | W124 |
| 722.366 | W4A040 | 392 N·m (289 lb·ft) | W124, W140 |
| 722.367 | W4A040 | 392 N·m (289 lb·ft) | W126, W140 |
| 722.368 | W4A040 | 392 N·m (289 lb·ft) | W140 |
| 722.369 | W4A040 | 392 N·m (289 lb·ft) | W124 |
| 722.370 | W4A040 | 392 N·m (289 lb·ft) | W124, W140 |
| 722.394 | W4A028 | 275 N·m (203 lb·ft) | W463 |
| 722.396 | W4A028 | 275 N·m (203 lb·ft) | W461, W463 |
Version-to-chassis mappings drawn from Mitchell and mbmanuals application charts. Dozens of further 722.3xx spare and market-specific codes exist beyond those listed; W4A028 (.394/.396) is the G-Class off-road calibration.
Applications.
Every model shifted by the 722.3.
- 1981–1985 Mercedes-Benz 280 E Sedan
- 1981–1985 Mercedes-Benz 280 TE Wagon
- 1981–1985 Mercedes-Benz 280 CE Coupé
- 1981–1985 Mercedes-Benz 300 D Turbo Sedan
- 1981–1985 Mercedes-Benz 300 TD Turbo Wagon
- 1981–1985 Mercedes-Benz 300 CD Turbo Coupé
- 1981–1991 Mercedes-Benz 380 SE Sedan
- 1981–1991 Mercedes-Benz 500 SE Sedan
- 1981–1991 Mercedes-Benz 500 SEL Sedan
- 1981–1991 Mercedes-Benz 500 SEC Coupé
- 1986–1991 Mercedes-Benz 420 SEL Sedan
- 1986–1991 Mercedes-Benz 560 SEL Sedan
- 1986–1991 Mercedes-Benz 560 SEC Coupé
- 1986–1989 Mercedes-Benz 560 SL Roadster R107
- 1986–1995 Mercedes-Benz 300 E Sedan
- 1986–1995 Mercedes-Benz 300 TE Wagon
- 1988–1995 Mercedes-Benz 300 CE Coupé
- 1990–1992 Mercedes-Benz 400 E Sedan
- 1991–1995 Mercedes-Benz 500 E Sedan
- 1993–1995 Mercedes-Benz E 320 Sedan
- 1993–1995 Mercedes-Benz E 420 Sedan
- 1994–1995 Mercedes-Benz E 500 Sedan
- 1990–1993 Mercedes-Benz 300 SL Roadster R129
- 1990–1993 Mercedes-Benz 300 SL-24 Roadster R129
- 1990–1992 Mercedes-Benz 500 SL Roadster R129
- 1993 Mercedes-Benz 500 SL Roadster R129
- 1993 Mercedes-Benz 600 SL Roadster R129
- 1994–1995 Mercedes-Benz SL 500 Roadster R129
- 1994–1995 Mercedes-Benz SL 60 AMG Roadster R129
- 1994–1995 Mercedes-Benz SL 600 Roadster R129
- 1991–1993 Mercedes-Benz 300 SE Sedan
- 1991–1993 Mercedes-Benz 400 SE Sedan
- 1991–1998 Mercedes-Benz 500 SEL Sedan
- 1993–1998 Mercedes-Benz S 320 Sedan
- 1993–1998 Mercedes-Benz S 420 Sedan
- 1993–1998 Mercedes-Benz S 500 Sedan
- 1994–1997 Mercedes-Benz C 280 Sedan
- 1994–1997 Mercedes-Benz C 36 AMG Sedan
- 1989–1993 Mercedes-Benz 190 E 2.6 Sedan
- 1990–1996 Mercedes-Benz 250 GD Wagon W463
- 1990–1996 Mercedes-Benz 300 GE Wagon W463
- 1990–1996 Mercedes-Benz 350 GD Turbo Wagon W463