66RFE Pump 2019, new and ready to install. Fits the 66RFE. Ships fast from the USA.
If your 2019 or newer Ram heavy-duty truck has a converter that will not stay locked on the highway, transmission temperature that creeps up while towing, or line pressure that wanders on the scan tool, the cause can be four small valves inside the front pump. This listing is a pump valve repair kit for 2019-and-later RFE pumps. It is not a complete pump. The kit contains a pressure regulator valve, a TCC switch valve, a 2019-up style TCC regulator valve and a TCC limit valve. Our store title calls it a 66RFE pump, so read the fitment section before you order.
The pump gears only create flow. The valves in the pump body decide where that flow goes. The pressure regulator valve holds line pressure and passes the overflow on to the converter and cooler. The TCC switch valve routes oil to release or apply the converter clutch. The TCC regulator valve meters converter apply pressure, and the limit valve keeps converter feed pressure in check while the clutch is released.
The 2019 redesign is why this kit is year-specific. Transmission Digest explains that 2019 units added a separate TCC solenoid in a small housing on the lower channel plate, so the Low/Reverse solenoid no longer doubles as the converter clutch solenoid. The pump-side TCC regulator valve changed with that control strategy, and the Sonnax RFE valve body layout lists its TCC regulator and accumulator kits as fitting 2018-and-earlier 68RFE units only. A pre-2019 valve will not give the right converter control on a late pump.
On a 2019-up truck, test the new stand-alone TCC solenoid and its circuit first, because it is easier to reach than the pump. Our 68RFE solenoid testing guide covers that. Next, graph commanded and actual line pressure with the fluid hot. GEARS Magazine gives roughly 60 to 70 psi at idle, with duty cycle near 22 to 24 percent, as healthy; the 68RFE pump failure guide explains how to read a pressure that will not keep up. If the electrical side is clean, remove the pump and vacuum-test each valve bore. A bore that leaks badly may need reaming and an oversized valve rather than a stock replacement valve.
The kit is listed for all 2019 and later RFE applications. The quick check is the pass-through case connector on the side of the transmission: blue means the 2019-up design that takes this kit. If your connector is white or gray, the truck is an earlier design and needs the 1999-2018 RFE pump valve kit instead. About the 66RFE name on this listing: published application lists for the 66RFE stop at the 2018 model year (Ram 2500 and chassis cab gas trucks), so on a 2019-up truck this kit is in practice for the 68RFE behind the 6.7L Cummins. If your truck is labeled 66RFE, check the connector color or send us your year and VIN before ordering. More late-model parts are on our 68RFE parts page.
| Fits | 66RFE 2019 |
| Part type | Pump |
| Condition | New |
| 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. It is a valve repair kit for the pump body: pressure regulator valve, TCC switch valve, 2019-up TCC regulator valve and TCC limit valve. Your pump body, gears and cover are reused.
No. The 2019 redesign moved converter control to a separate TCC solenoid and changed the TCC regulator valve. A white or gray connector unit takes the 1999-2018 pump valve kit.
Published 66RFE applications end with the 2018 model year, so on 2019-up trucks this kit is used on the 68RFE. Check for the blue pass-through connector or send us your year and VIN.
If the TCC solenoid and wiring test good but lockup still slips, line pressure does not match commanded, or the engine stalls on engagement, worn pump valve bores are a likely cause.
ATF+4 only. Check and set the level hot, at 160 degrees F or higher, with the engine running.
