45RFE Pump 2006, remanufactured and ready to install. Fits the 45RFE. Ships fast from the USA.
When a 2006 Liberty, Ram 1500 or Durango with the four-speed 45RFE sits in gear for a moment before it moves, only creeps once you add throttle, or sets P0868 and P0944 after a long drive, the front pump belongs on the suspect list. This remanufactured 45RFE pump for 2006 replaces the complete assembly, gears, body and valve train, so the transmission gets back the volume and pressure it needs without you machining a worn pump on the bench.
The 45RFE pump is a gear-type pump turned by the torque converter hub, so it runs any time the engine is running. Everything hydraulic in the unit starts here: clutch apply oil, converter charge, lockup apply, cooler flow and lubrication. The pump assembly is also a small valve body. Its pressure regulator valve sets main line pressure, while the TCC regulator, TCC switch and TC limit valves manage converter clutch oil.
The transmission controller sets the pressure it wants by changing the duty cycle on a variable force solenoid, roughly 5 percent for maximum pressure and about 65 percent for minimum, and reads the result from a pressure sensor on the case. A worn pump makes the controller ask for more and more pressure without ever reaching it, and that mismatch is what sets the line pressure codes.
If P0944 is stored, Chrysler's procedure is to diagnose it first. Its cause list includes a cracked or misinstalled primary filter or filter seal and a loose cooler return filter, both far cheaper than a pump. Next, watch desired and actual line pressure on a scan tool as the fluid heats. Electrical codes such as P0934 and P0935 point at the pressure sensor circuit, not the pump. Wiggle the sensor connector while watching the reading, because worn terminal joints can fake low pressure. Our 45RFE pump failure guide covers the full order of checks, and the pressure control solenoid guide explains how to separate a solenoid fault from a weak pump.
This pump is listed for the 2006 45RFE. Early and later RFE pumps are not identical: ATSG documented that early pumps use spacer plate screws in a main line pressure passage, while the redesigned pump has those holes cast shut. Lube circuit and casting changes followed as well. Compare your old pump to the listing before ordering, or send us the year and VIN and we will match it. If your unit is the five-speed, see the 545RFE pump 2006; the 45RFE pump 2007 covers the following year. All pumps and kits for this family are on the 45RFE and 545RFE parts page.
| Fits | 45RFE 2006 |
| Part type | Pump |
| 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.
The 45RFE four-speed was used in Chrysler, Dodge and Jeep trucks and SUVs including the Ram 1500, Durango and Liberty. Engine and drivetrain decide whether a given 2006 vehicle has the 45RFE or the five-speed 545RFE, so check the transmission tag or send us your VIN.
No. P0944 is loss of hydraulic pump prime, and Chrysler's cause list starts with a cracked or misinstalled primary filter or seal and a loose cooler return filter. Check those, and the fluid level, before replacing the pump.
They share the same pump design family, and Sonnax lists one remanufactured pump for both. Spacer plate, casting and lube circuit details changed over the years, so match the replacement to your old pump.
A front seal, the pickup filter and the cooler return filter at minimum, plus a cooler flush. If the old pump was scored by debris, the clutches and converter need attention too.
Reset the adaptives and run a quick learn with a scan tool after the install, then road test while watching desired and actual line pressure. They should stay within a few psi of each other.
