45RFE Solenoid Kit 1999-03, new and ready to install. Fits the 45RFE. Ships fast from the USA.
When an early 45RFE drops into limp mode, starts off in second, sets a P0750-series solenoid code or refuses to shift after a cold start, the solenoid pack on the side of the valve body is one of the first parts to check. This listing is a new Mopar-boxed 45RFE solenoid pack service kit for 1999-2003 trucks and Jeeps such as the Ram 1500, Dakota, Durango and Grand Cherokee. The photo shows what comes in it: the solenoid pack assembly, a pan filter, a second smaller cylindrical filter, a pan gasket and the small hardware, so the pack and the filters get done in one pan-down job.
The 45RFE was Chrysler's first fully electronic rear-wheel-drive automatic, introduced for 1999. It has no shift valves driven by a governor. Instead, the computer fires solenoids in the pack to apply each clutch directly. Sonnax lists the solenoids on the white-connector pack as low/reverse, multi-select, underdrive, overdrive, 4th clutch and 2nd clutch, each about 1.3 ohms, plus a pressure control solenoid of about 3.5 ohms that sets line pressure. The pack also carries the pressure switches the computer uses to confirm each clutch actually applied. All of it plugs into one 23-pin connector, so a single bad coil, a cracked connector or a failed pressure switch can make the whole transmission misbehave.
Do the electrical checks first. Chrysler's service information says a P0750 solenoid code is strictly an electrical fault, caused by a wiring problem, the computer, or an open in the solenoid assembly itself, and that the valve body should not be replaced for it. With the connector unplugged, measure each solenoid against the values above and look for corroded or pushed-back pins. A pressure switch code, on the other hand, can be hydraulic, so a low fluid level or an internal leak has to be ruled out. Our 45RFE shift solenoid symptoms and testing guide walks through each test, and the 45RFE pressure control solenoid guide covers line pressure codes.
This kit is listed for the 45RFE from 1999 to 2003. That window matters: Sonnax notes the very first 1999 packs used a black 23-pin connector that was short-lived, the white-connector pack ran from 2000 into 2009, and a gray five-solenoid pack arrived later that cannot back-service the early six-solenoid units. Pull your old pack and compare the connector color and the part number on it with this one before you order, or send us the year, model and VIN. All our 45RFE parts are on the 45RFE parts page.
If the pack tests good and the truck still shifts badly, the fault is often hydraulic. A 45RFE pump for 1999-2007 or a full 45RFE/545RFE master rebuild kit may be the real fix; see 45RFE valve body problems for how to tell.
| Fits | 45RFE 1999-03 |
| Part type | Solenoid Kit |
| Condition | New |
| 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.
It is listed for 1999-2003 45RFE units. Early 1999 packs used a black connector and 2000-later packs a white one, so compare the connector color and the part number on your old pack before ordering.
As shown in the photo: the solenoid pack assembly, a pan filter, a second smaller cylindrical filter, a pan gasket and small hardware, in Mopar packaging.
No. The pack bolts to the side of the valve body and comes off once the pan and filter are removed.
Yes. Chrysler calls for a Quick Learn after solenoid pack replacement so the computer relearns clutch fill volumes. Without it, shifts can be harsh or soft until it adapts.
It will if the cause is a failed solenoid, connector or pressure switch in the pack. Check wiring, fluid level and codes first; pressure switch codes can also come from internal leaks.
ATF+4. Chrysler specifies ATF+4 for the RFE transmissions; do not substitute a universal or Dexron-type fluid.
