545RFE Solenoid Kit 1999, remanufactured and ready to install. Fits the 545RFE. Ships fast from the USA.
A 545RFE that suddenly holds one gear, sets a P0750-series solenoid code, or bangs into Reverse after a short stop usually has a problem on the electrical side of the valve body, and the solenoid pack is where most of those problems live. This kit is for owners of 545RFE-equipped Ram 1500, Durango, Dakota and Jeep models who want to do the pack and the filters in one pan-down job. The product photo shows the full contents: the solenoid pack with its 23-pin connector, the sump filter, the spin-on cooler return filter and a molded pan gasket.
The 545RFE is the five-speed member of Chrysler's RFE family and has no hydraulic governor or mechanical shift valves deciding when to shift. Every clutch apply is commanded by the computer through the pack. Transmission Digest's ATSG article on the 45RFE and 545RFE counts seven solenoids in the system: line pressure control, underdrive, overdrive, second clutch, fourth clutch, low/reverse (which also handles converter clutch apply) and multi-select. Three of them are normally applied, so if power to the pack is cut the unit still has line pressure and a limp gear to drive home in.
The multi-select solenoid is the one that makes a 545RFE feel strange when it fails. It is energized in most ranges and switches off for the 2-3 shift to apply the overdrive clutch, and in Reverse it feeds the low/reverse clutch through the manual valve. The same pack carries the pressure switches the computer reads to confirm that each clutch actually came on, so a sticking switch can trigger failsafe even when the clutches are fine.
Chrysler's service information is clear that a P0750 code is strictly an electrical fault: the wiring, the computer, or an open inside the solenoid assembly. It also says not to replace the valve body for it. So start with the connector. Look for fluid wicking up the harness, green corrosion and pushed-back pins, then meter the coils with the plug off. Sonnax lists about 1.3 ohms for each shift solenoid and about 3.5 ohms for the pressure control solenoid on this pack. Pressure switch codes are different, because low fluid, a worn pump or an internal seal leak can set them too. Our RFE shift solenoid testing guide walks through each step, and the pressure control solenoid and line pressure guide covers P0868 and P0869.
This listing is labeled 1999, the year the RFE family started. Sonnax notes that the first RFE was the four-speed 45RFE, with the 545RFE coming later as the design was updated, and that the original 1999 pack used a black connector that was short-lived and not recommended. The pack shown here has the white-style connector Chrysler used from 2000 through 2009, which still carries the overdrive solenoid. It is not the gray 2010-and-later pack, and Sonnax warns a gray pack cannot back-service the earlier six-solenoid design. Before ordering, check the color of the connector on your old pack and send us your year and VIN if you are unsure. You can compare every RFE part we carry on the 45RFE and 545RFE collection page.
The pack bolts to the side of the valve body and is reached with the pan down, so drain the fluid, drop the pan and change the sump filter while it is open. Fit the new pan gasket, spin on the new cooler return filter, and refill with ATF+4 only. Check the case connector seal before plugging in, and clear the codes. Chrysler lists solenoid pack replacement as one of the jobs that requires a Quick Learn with a scan tool: brakes applied, engine running above 500 rpm, closed throttle and fluid between 60 and 200 F. If a speed sensor code showed up with the shift complaint, replace the input and output speed sensors at the same time. If the codes point to worn valve body bores rather than a coil, a complete 1999-2009 RFE valve body is the better repair.
| Fits | 545RFE 1999 |
| Part type | Solenoid Kit |
| 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 RFE family started in 1999 with the four-speed 45RFE, and the five-speed 545RFE came later on the same design. This kit is listed under 1999 but the pack pictured is the white-connector type used from 2000 to 2009, so match your connector color or send us your year and VIN.
As pictured: the solenoid pack with the 23-pin connector, a sump filter, a spin-on cooler return filter and a pan gasket. Fluid is not included; plan on ATF+4 for the refill.
It is the earlier white-connector design. Sonnax notes the gray pack used from 2010 drops the overdrive solenoid, and the gray pack cannot be used on earlier units. Send us your VIN and we will tell you which pack your truck takes.
Yes. Chrysler calls for a Quick Learn after solenoid pack replacement. It needs the brakes applied, the engine above 500 rpm, the throttle closed and the fluid between 60 and 200 F, and it resets the clutch fill values so the shifts come in correctly.
Usually not. Chrysler's diagnostic for P0750 says it is strictly an electrical fault and specifically says not to replace the valve body for it. Check the harness and connector, meter the coils, and replace the pack if a coil is open or shorted.
