45RFE Governor Pressure Solenoid 2004, remanufactured and ready to install. Fits the 45RFE. Ships fast from the USA.
Plenty of 2004 Dodge Ram 1500, Dakota, Durango and Jeep owners type "45RFE governor pressure solenoid" into a search bar after the truck starts shifting late, sticking in second, or setting a handful of transmission codes. The part name comes from the older Chrysler four-speeds, and it does not exist on the 45RFE. What this listing actually supplies is the part that took over that job: a remanufactured genuine Mopar solenoid block, manufacturer part number 52119435AF (interchange D72420B), the white-connector pack used on 45RFE and 545RFE units from 2004 on.
On the 42RE, 44RE and 46RE, road speed was turned into a hydraulic governor pressure, and a governor pressure solenoid and sensor managed it so the shift valves knew when to move. Sonnax describes the RFE as Chrysler's first fully electronic rear-wheel-drive transmission: there are no 1-2, 2-3 or 3-4 shift valves and no hydraulic governor. The controller reads the input and output speed sensors to know road and turbine speed, then fires solenoids in the pack to apply and release each clutch. So when someone needs the "governor solenoid" on a 45RFE, the honest answer is the solenoid pack, often along with a speed sensor check.
The block bolts to the valve body and holds six clutch solenoids, the variable force pressure control solenoid that sets line pressure, and pressure switches that confirm each circuit actually filled. It plugs into the case through a 23-pin pass-through connector. Sonnax gives roughly 1.3 ohms per shift solenoid and about 3.5 ohms for the pressure control solenoid when measured at that connector, which is how a shop separates a bad coil from a wiring fault.
Check ATF+4 level hot and look at its condition first. Then pull codes and look at desired versus actual line pressure on a scan tool. A speed sensor code points somewhere else entirely, so read our 45RFE input and output speed sensor guide before condemning the pack. For coil resistance, connector checks and pressure switch tests, follow the 45RFE shift solenoid testing guide. A pack that tests good while pressure is still wrong usually means valve body or pump wear.
This page covers the 2004 45RFE. The source listing names 45RFE and 545RFE from 2004 on, and Sonnax notes the white-connector pack ran from 2000 through 2009 and can also service 2009 and later units, while the later gray-connector pack cannot go backward into a white-connector truck. A 1999 black-connector transmission is a different case. Some 2004 Ram 1500 and Durango trucks carry the five-speed 545RFE, which has its own 2004 545RFE listing. Compare the connector color and the label on your old pack with the photos, or send us your year and VIN and we will check it. Everything else for this unit is on the 45RFE and 545RFE parts page.
If the speed or line pressure sensors are original, the input, output and pressure sensor kit is worth doing at the same time. Worn bores that keep leaking pressure call for a remanufactured 45RFE valve body.
| Fits | 45RFE 2004 |
| Part type | Governor Pressure Solenoid |
| Condition | Remanufactured |
| 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.
No. The governor pressure solenoid and sensor belong to the older RE four-speeds such as the 46RE. The 45RFE is fully electronic and uses input and output speed sensors plus the solenoid pack, which is what this listing is.
It fits 2004 trucks with the white-connector 45RFE. Some 2004 Ram 1500 and Durango models used the 545RFE, which has its own listing. Match the connector color and pack label to the photos, or send us your VIN and we will confirm.
It is a remanufactured genuine Mopar pack, manufacturer part number 52119435AF, with interchange number D72420B.
Yes. Clear the codes and run the transmission Quick Learn with a scan tool that supports it, then road test so the controller can adapt clutch fill times.
ATF+4 only. Set the level with the fluid at normal operating temperature after the pack and filters are installed.
