545RFE Pump, remanufactured and ready to install. Fits the 545RFE. Ships fast from the USA.
A 545RFE that sits in gear for a second or two before it pulls, flares between shifts once it is hot, or keeps setting P0944 and P0868 is usually telling you it is short on line pressure, and the front pump is where that pressure starts. This is a remanufactured 545RFE pump assembly with the front seal already installed in the body, built for the 4.7L V8 and 5.7L Hemi Ram 1500, Dakota and Durango in both 2WD and 4WD. It replaces the whole pump, so worn gears, a tired regulator valve and a leaking seal are handled in one part.
The 545RFE uses a gear-type pump bolted to the front of the case and turned by the torque converter hub. Every time the engine runs, it draws fluid from the pan through the primary filter and pushes it out as main line pressure. That oil clamps the clutches, fills the converter, flows through the cooler and lubricates the planetary sets. The pump body is more than a pump in this unit: it carries the pressure regulator valve, the TCC regulator valve and the TCC switch valve. Sonnax lists wear in exactly those valves, along with damaged pump gears, as the reason worn RFE pumps cause low pressure, pressure regulation codes and converter clutch slip.
Because the controller only sees pressure through the line pressure sensor and the switches in the solenoid pack, a weak pump shows up as a gap between desired and actual pressure on a scan tool long before it stops the truck.
The pump is an out-of-the-vehicle job, so rule out the cheap causes first. Chrysler's P0944 procedure has you check fluid level and condition, shift linkage, a cracked or misinstalled primary filter or filter seal, and a loose cooler return filter before it ever calls for a new pump. Low fluid and a filter that is not seated in the pump bore will both mimic a dead pump. Electrical faults in the pressure control solenoid or line pressure sensor can also read like low pump output. Our 45RFE and 545RFE pump failure guide lays out the order of tests, and the valve body testing guide covers the switch valve and checkball faults that are often mistaken for pump trouble.
This pump is a seal-in-pump design for 45RFE and 545RFE (also called 5-45RFE) applications with the 4.7L and 5.7L engines, 2WD and 4WD. The pump listing cross-references Mopar numbers R8009879AE and 68009879AF and the earlier R8004735AC. RFE pumps changed over the years in lube circuit and casting, and later 545RFE, 65RFE and 66RFE pumps were built without a front seal in the pump, so compare your old pump with the photos and the numbers above, or send us your year and VIN and we will confirm the match. Year-specific versions and every other part for this family are on the 45RFE and 545RFE parts page.
| Fits | 545RFE |
| 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.
Yes. It is a remanufactured assembly with the front seal installed in the pump body. Still inspect your converter hub before installing so the new seal is not damaged on a scored hub.
The pump is listed for 45RFE and 545RFE applications with the 4.7L and 5.7L engines in 2WD and 4WD. Compare your old pump to the photos or send us your year and VIN so we can confirm before it ships.
ATF+4 only. Chrysler lists 5.2 L for a 4x2 service fill, 6.2 L for 4x4, and 14 to 16 L after an overhaul. Prime the pump with ATF+4 before the first start.
Yes. Low fluid, a cracked or unseated primary filter, a bad filter seal and a loose cooler return filter are all listed causes of P0944. Check them before pulling the transmission.
Clear codes and road test while watching line pressure. If clutches or the solenoid pack were also replaced, run the quick learn with a capable scan tool so shift timing adapts to the new parts.
