722.4 Valve Body 1994, used and ready to install. Fits the 722.4. Ships fast from the USA.
If your 1994 Mercedes C-Class or E-Class four-speed slams into second, flares on the 2-3, hangs in a gear, or will not upshift at all after a careful fluid and filter service, a sticking or worn valve body is near the top of the list. This is a used, complete 722.4 valve body, a whole assembly rather than a recalibration kit, for owners who want to bolt in a working unit instead of rebuilding a worn casting on the bench.
The 722.4 (Mercedes code W4A 020) is the lighter member of the 4G-Tronic family that also includes the 722.3. It is a fully hydraulic four-speed with no shift computer, no lock-up clutch and no shift solenoids, so the valve body does everything a TCM does in a modern unit. Governor pressure tells it road speed, the control pressure cable tells it throttle position, and the vacuum modulator sets how firm each shift is. The assembly is really two pieces: the main valve body (the shift valve housing) carries the shift valves, springs and check balls, and the secondary valve body behind the intermediate plate holds the reverse lockout and two small screen filters. The K1 and K2 accumulators sit in the lower valve body and cushion the 2-3 and 3-4 shifts.
There are no electronic trouble codes on this transmission, so diagnosis is done with a gauge and a road test, not a scan tool.
Set the fluid level hot first. Then check the cheap items: a kickdown switch behind the pedal that sends constant power, or a stuck kickdown valve, will stop upshifts on a healthy valve body. Confirm modulator pressure at the test port and the control pressure cable adjustment, because a soft modulator alone causes a 2-3 flare. If those check out and the shift problem remains, the valve body is the next step. If the car is actually a 1996-up model with the electronic five-speed, see our 722.6 valve body symptoms guide instead, and our 722.6 common problems guide explains how that later unit differs.
For the 1994 model year, Mercedes used the 722.4 in the W202 C-Class (introduced for 1993-1994) and in many W124 E-Class cars, while the larger-engine models carried the heavier 722.3. Both look similar from underneath, so read the code on the transmission tag and match it to this listing. Gas and diesel calibrations also differ inside the valve body. Compare the casting and the old unit, or send us your year, model and VIN and we will confirm before it ships. If you would rather rebuild your own casting, our 722.4 valve body kit is the recalibration option. Every Mercedes unit we stock is on the Mercedes 722 transmission parts page.
| Fits | 722.4 1994 |
| Part type | Valve Body |
| Condition | Used |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is a used, complete 722.4 valve body assembly. If you want to recalibrate your own casting instead, our 722.4 valve body kit is the separate kit option.
In 1994 the 722.4 went into the W202 C-Class and many W124 E-Class cars, while larger engines used the 722.3. Read the transmission code on the tag or send your VIN and we will confirm.
A Dexron II or Dexron III type ATF. Check it hot, at about 80 C, where the gap between min and max on the dipstick is only about 0.3 liter.
Only if the valve body is the cause. Check the kickdown switch and kickdown valve and the governor first, and clean the two screens in the secondary valve body.
Yes. Recheck modulator pressure and the control pressure cable adjustment after the road test, because they set shift firmness and timing on this hydraulic unit.
