42RLE Pressure Control Solenoid 2007, new and ready to install. Fits the 42RLE. Ships fast from the USA.
A 2007 to 2011 Jeep Liberty or Wrangler JK, Dodge Nitro, Ram 1500 3.7L or Charger V6 with the four-speed 42RLE that slams into third, thumps on the 2-1 coast downshift, or throws P0869 and drops into limp mode may have a failed line pressure solenoid. This is a new Mopar 42RLE EPC electronic pressure control solenoid, part number 05078911AA (interchange 05078341AA), for the variable line pressure 42RLE built from 2007 on. It ships from the USA.
The 42RLE is the rear-drive version of Chrysler's 41TE design, and through 2006 it ran fixed line pressure: roughly 120 to 145 psi in first and second, cut to about 85 psi for third and fourth when overdrive clutch oil reached the pressure regulator valve. The 2007 update replaced that hydraulic trick with electronic control. This variable force solenoid sets line pressure, and a separate pressure sensor reports the real number back so the controller can compare desired and actual pressure on the scan tool. The shift solenoid pack on the valve body stays in service; this solenoid only manages pressure.
Because pressure is now commanded rather than fixed, the computer can drop it whenever full pressure is not needed. Transmission Digest recorded about 135 psi in first and second, about 85 psi after the 2-3 shift at roughly 25 percent duty cycle, a further reduction with the converter clutch locked, and up to 62 percent duty cycle on a coasting 2-1 downshift to take out the bump earlier 42RLEs had.
Do not throw a solenoid at P0869 without testing. The same code comes from a failed pressure sensor, a bad sensor signal, a sticking pressure regulator valve, or a computer that thinks it is driving the solenoid when it is not, and the computer is a documented pattern failure on these units. Watch desired versus actual line pressure on a scan tool, then back-probe the solenoid control wire with a meter on negative duty cycle. No rise to about 25 percent on the 2-3 shift means the computer is at fault. A proper rise with no pressure drop on a gauge means this solenoid or the regulator valve; a pressure drop that the sensor does not report means the sensor circuit. Our 41TE family limp mode and clutch volume index guide covers the related codes, and the slipping under load guide explains how low line pressure burns clutches in this family.
This part is for VLP 42RLE transmissions, 2007 and later. The application list includes the 2007-2011 Jeep Liberty 3.7L and Wrangler 3.8L, 2007-2011 Dodge Nitro 3.7L and Ram 1500 3.7L, the Dakota 3.7L V6, the Mitsubishi Raider 3.7L, and the four-speed V6 Chrysler 300, Dodge Charger, Magnum and Challenger. A VLP case has an extra five- or six-pin connector next to the range sensor; a 2003 to 2006 42RLE without it does not use this part. Check the number on your old solenoid against 05078911AA or 05078341AA, or send us your year and VIN to confirm. Front-drive 41TE cars take the 41TE pressure control solenoid, and every 41TE-family part is on our 41TE and 42RLE parts page.
| Fits | 42RLE 2007 |
| Part type | Pressure Control Solenoid |
| Condition | New |
| 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.
No. Variable line pressure arrived on the 42RLE in 2007. Earlier units run fixed line pressure and have no line pressure solenoid or the extra case connector beside the range sensor.
No. The pack holds the shift solenoids and pressure switches and is still used on VLP units. This is the separate line pressure control solenoid.
A failed line pressure sensor, sensor wiring faults, a sticking pressure regulator valve, or a bad transmission computer. Test duty cycle and actual line pressure on the 2-3 shift to find which one.
This solenoid is Mopar 05078911AA with interchange 05078341AA. Compare those to the number on your old part or send us your year and VIN.
Yes. Clear the codes and run the Quick Learn with a scan tool, then drive through all four gears so the controller relearns shift timing.
ATF+4. Using a different fluid can cause harsh or flared shifts even with a new solenoid.
