66RFE Pump, remanufactured and ready to install. Fits the 66RFE. Ships fast from the USA.
When a gas-engine Ram 2500 or 3500 with the 66RFE starts taking a second or two to grab Drive after a long pull, flares between gears with a trailer behind it, or sets a low line pressure code that a new filter did not cure, the front pump is the next thing to look at. This remanufactured 66RFE pump is a rebuilt OEM core, pictured from the back side so you can see the valve body face, the pressure passages and the reaction shaft bore. It is the middle ground between gambling on a used pump and paying for new.
The 66RFE is the name Chrysler gave the recalibrated 545RFE in gas heavy duty Rams from 2012. It shifts as a five-speed in normal Drive and uses sixth only when the driver selects gears with Electronic Range Select. Like the rest of the RFE family it runs six clutch packs and a low sprag with no bands, so every apply depends on clean, steady oil supply from the pump. The pump body is also a valve body in its own right: it carries the primary pressure regulator valve and the valves that apply and release the torque converter clutch. A tired pump therefore shows up two ways at once, as low line pressure on every clutch and as poor converter clutch control.
A scan tool tells you most of what you need. Bring the fluid to operating temperature, set the level with ATF+4, and compare desired and actual line pressure at idle in Drive. When everything is healthy the two stay within a few psi. If they match cold, then actual falls well below desired at hot idle and jumps back up the moment you open the throttle, that is the typical worn pump signature. If actual is low when cold and improves as it warms, look at the filter first, and if actual bounces erratically, the filter seal may be letting the pump suck air. GEARS Magazine also uses the line pressure duty cycle to separate a supply problem from a valve body leak. Our RFE pump failure guide lays out that sequence, and the shift solenoid guide helps rule out the electrical side.
This pump is listed for the 66RFE without a specific year range. The 66RFE was used behind the gas engines in Ram 2500 and 3500 trucks, and parts in the RFE family did change over production, so match your old pump to the photo: bolt pattern, reaction shaft, and the layout of the passages on the valve body side. The diesel 68RFE uses a different pump and is not covered by this listing. Send us your year and VIN if you want us to confirm before ordering, or browse everything for this transmission family in the RFE parts collection.
A pump that failed from heat often leaves its mark on the electrical side too. If you have had solenoid codes, the 66RFE solenoid kit is worth replacing at the same time, and a truck with worn valve bores may also need the 66RFE valve body for 2008-2018. This remanufactured pump carries a 1-year warranty and ships from the USA.
| Fits | 66RFE |
| 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.
No. The 68RFE behind the 6.7L Cummins has its own pump and a much heavier converter. This listing is for the gas 66RFE.
Gas-engine Ram 2500 and 3500 trucks after the 2012 recalibration of the 545RFE. Earlier gas heavy duty trucks used the same basic unit under the 545RFE name. Match your old pump to the photo or send us your VIN.
Watch desired and actual line pressure. A worn pump reads low at hot idle and recovers with throttle. A restricted or poorly sealed filter usually reads low when cold, or makes actual pressure jump around.
ATF+4 only, with the level checked at operating temperature.
Yes. Run the transmission adaptive relearn with a capable scan tool so the controller relearns clutch fill times on the restored line pressure.
