722.6 Pressure Control Solenoid 2005-2011, new and ready to install. Fits the 722.6. Ships fast from the USA.
A 2005-2011 Chrysler 300 with the five-speed automatic that bangs into gear, flares between shifts, feels soft and slippy when warm, or has started setting pressure solenoid codes is often pointing at one of the two pressure regulating solenoids in the valve body. This is a new genuine Mopar pressure solenoid, part number 5138838AA, for the NAG1 transmission, which is Chrysler's name for the Mercedes 722.6 (W5A580). Mopar lists 5138838AA as the replacement for the earlier 52108312AA, so if your old solenoid carries either number, this is the current part.
The 722.6 uses two variable pressure regulators alongside its three on-off shift solenoids. The modulating pressure regulating solenoid (Y3/6y1) puts out 0 to about 125 psi, and that signal drives the main regulator valve, raising working pressure from a static 60 psi up to roughly 320 psi as engine torque rises. The same modulating oil also biases the overlap valves, so the hand-off between the releasing and applying clutch matches the load. The shift pressure regulating solenoid (Y3/6y2) works only during a shift, setting clutch-apply pressure anywhere from 0 to about 220 psi. Both are fed from the same 125 psi supply. When either one sticks, leaks past its O-ring or loses its filter screen, every shift in the box changes character, not just one gear.
This transmission has no pressure test ports, so you cannot hang a gauge on it the way you would on a Chrysler RFE unit. Diagnosis runs through a scan tool. Pull the codes and freeze-frame data, check the solenoid resistance at the round case connector, and pull that connector to look for fluid inside it. On 2004-and-later NAG1 vehicles the adapter sleeve O-rings leak, ATF wicks into the plug and sets intermittent solenoid codes on good parts. Also keep in mind that a worn working-pressure regulator valve bore in the valve body produces nearly the same flare as a weak solenoid. Our 722.6 pressure control solenoid guide walks through separating the two, and the 722.6 shift solenoid guide covers single-gear faults that are not pressure related.
This listing is for 2005-2011 Chrysler 300 models with the five-speed NAG1 automatic. The same Mopar number is catalogued across other NAG1-equipped Chrysler, Dodge and Jeep vehicles, but we only state the fit the listing supports. Parts catalogs describe 5138838AA as both a modulating pressure and a shift pressure solenoid, so compare the number on the solenoid you remove, or send us your year and VIN before ordering. It does not fit the six-speed or later eight-speed transmissions. More parts for this family are on our 722.6 and 722.9 collection page.
If the valve body bores are worn or several solenoids are suspect, a complete 722.6 valve body may be the better repair, and a 722.6 overhaul kit covers the seals if the unit is coming out anyway.
| Fits | 722.6 2005-2011 |
| Part type | Pressure Control Solenoid |
| Condition | New |
| Brand | Mopar |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The listing is for 2005-2011 Chrysler 300 models with the five-speed NAG1 (722.6) automatic. Compare the number on your old solenoid with 5138838AA or the older 52108312AA it replaces, or send us your year and VIN to confirm.
Parts catalogs list 5138838AA under both names. The 722.6 has two pressure regulating solenoids in the valve body. Match the part number stamped on the one you are replacing before you order.
Expect pressure control solenoid circuit or performance codes in the transmission module. Before replacing the solenoid, check the case connector for oil intrusion, which sets the same codes on good parts.
Use the fluid your owner's manual specifies. Chrysler-built NAG1 vehicles list Mopar ATF+4. Set the level with the transmission at operating temperature.
Yes. Clear the codes and reset the transmission adaptations with a capable scan tool, then road test so the module relearns shift pressures.
If both are original and the mileage is high, many shops replace both while the valve body is out, since the O-rings on both age the same way. At minimum, re-ring the other one.
