66RFE Governor Pressure Solenoid 2010-2018, remanufactured and ready to install. Fits the 66RFE. Ships fast from the USA.
Searching for a 66RFE governor pressure solenoid usually means a 2010-2018 Ram is shifting hard, slipping, or sitting in limp mode, and the old Dodge part name is the one people remember. The 66RFE does not use a governor pressure solenoid; that was a four-speed RE part. On this transmission the job belongs to the shift solenoid pack on the valve body. This listing is a remanufactured Mopar gray-connector pack, OE part number 68376695AA, cross-referenced to 52120000AA, and it comes with a new filter screen.
Every shift in the 66RFE is commanded electrically. The controller picks a gear and energizes the matching clutch solenoids in this pack, which open oil circuits in the valve body to the underdrive, overdrive, 2C, 4C and low/reverse clutches. A variable force solenoid in the same housing sets line pressure, and when it loses power, pressure goes to maximum so the clutches hold hard instead of burning. Pressure switches built into the pack close when each clutch circuit fills, and the controller uses those signals to check its own work. When a coil opens, a switch sticks, or the internal seals leak, the controller sees a mismatch and drops into limp mode to protect the clutches.
The 2010-2018 gray pack differs from the earlier white pack. Sonnax explains that Chrysler eliminated one solenoid and two checkballs and gave the overdrive job to the multi-select solenoid. The result is a five-solenoid pack that needs the matching later valve body.
Start with hot fluid level and the condition of the fluid, then verify voltage at the transmission control relay output. A scan tool that shows desired versus actual line pressure is the best single check: if the controller is commanding change and nothing happens, look at the pack and its circuit; if it is fighting to hold pressure, look at the pump and regulator first. For specific codes, our 66RFE P0871 fix and the 66RFE harsh shift causes guide separate pack failures from valve body wear, and the RFE valve body testing guide covers bore wear on the same casting.
The pack is listed for 2010-2018 RFE transmissions with the gray connector, including the 66RFE in gas Ram 2500 and Power Wagon trucks, and it is also listed for the 545RFE, 65RFE and 68RFE of the same era. Year alone is not enough. Drop the pan and confirm three things: the connector is gray, the part number on your pack matches 68376695AA or 52120000AA or supersedes to one of them, and the pack shape matches the photo. A white connector means the earlier six-solenoid design, and a blue connector means a 2019-up truck; neither will work. Send us your year and VIN if anything does not line up. All other parts for this unit are on our 66RFE parts page.
If your truck already shows valve body wear, the 66RFE shift kit corrects the worn circuits while the pan is down, and a shop doing a full teardown should keep the ATSG RFE rebuild manual on the bench for clearances and checkball locations.
| Fits | 66RFE 2010-2018 |
| Part type | Governor Pressure Solenoid |
| Condition | Remanufactured |
| 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. That part was used on the four-speed RE transmissions. The 66RFE controls shifts and line pressure through the solenoid pack, which is what this listing is.
It is listed as OE 68376695AA with interchange 52120000AA. Match the number on your old pack or send us your year and VIN.
Yes, a new screen is included. Use it rather than the old one, since RFE screens differ between pack generations.
No. 2019-up RFE trucks use a blue-connector pack with a separate converter clutch solenoid. This is the 2010-2018 gray-connector pack.
ATF+4 only, with the level set hot and the engine running.
Yes. Clear codes and run the quick learn with a scan tool so the controller learns clutch fill times on the new pack.
