45RFE Pump 1999-2007, remanufactured and ready to install. Fits the 45RFE. Ships fast from the USA.
Owners of a 1999-2007 Ram 1500, Dakota, Durango, Grand Cherokee or Liberty with the four-speed 45RFE usually land here after a long wait for Drive on a cold start, a truck that only creeps when the engine is revved, or a line pressure code that keeps coming back. This is a professionally rebuilt Mopar 45RFE pump assembly, the seal-type design used on the 45RFE and the early 5-45RFE, for the 1999-2007 range. It carries Mopar number 5072589AC.
The 45RFE was Chrysler's first fully electronic rear-drive automatic, and it leans hard on its pump. The converter hub spins the pump gears at engine speed, and the pump feeds main line pressure to the solenoid pack, which then applies the clutches. The pressure regulator valve that sets line pressure and the converter clutch valves live in the pump body, so a worn pump affects engagement, shift feel and lockup all at once.
On these early pumps the spacer plate is held to the pump body with small screws that sit in a main line pressure passage. ATSG documented that when those screws back out or go missing on the earlier design, line pressure bleeds off and the truck will not move unless the engine is brought way up. That is one reason a 45RFE can lose drive suddenly even though the gears themselves look fine.
Not every slow engagement on these trucks is a pump. Chrysler TSB 21-016-05 traced delayed engagement after a Durango sat overnight to converter drainback through the cooler return filter, which is a far cheaper fix. Check fluid level with ATF+4, look at the primary filter and its seal, and scan for pressure control solenoid and line pressure sensor codes before committing to a pump. Our 45RFE pump failure guide covers the test order, and 45RFE and 545RFE problems and fixes explains the switch valve faults that cause similar complaints.
This is a 1999-2007 seal-type 45RFE pump with the clad front seal pressed into the pump body and no seal on the pump cover. It also fits early 5-45RFE units built with the same seal-type pump. Later RFE pumps differ in seal arrangement and lube circuit casting, so match your old pump against the photos and the 5072589AC number, or send us your year and VIN and we will check it. The 545RFE pump 1999-2007 covers five-speed trucks, and all other years are on the 45RFE and 545RFE parts page.
| Fits | 45RFE 1999-2007 |
| Part type | Pump |
| 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.
The front seal is pressed into the pump body itself rather than elsewhere. This pump has the clad front seal in the body and no seal on the pump cover, which matches the 1999-2007 45RFE and early 5-45RFE design.
The 45RFE was used in Ram 1500, Dakota, Durango, Grand Cherokee and Liberty applications in this period. Engine and model year decide whether yours has the 45RFE or 545RFE, so send us your VIN if you are unsure.
Maybe not. Chrysler TSB 21-016-05 traced that complaint on the Durango to converter drainback through the cooler return filter. Check that first; a pump usually causes delay that also shows up when hot.
Mopar ATF+4, Type 9602. Do not use a generic multi-vehicle fluid in a fresh pump.
Check the converter hub where the seal rides, and fit a new pump gasket and O-ring, primary filter and cooler return filter at minimum. Rebuild the clutches if the fluid is burnt.
