48RE Pressure Control Solenoid 2003-2008, remanufactured and ready to install. Fits the 48RE. Ships fast from the USA.
Ram 2500 and 3500 owners with the Cummins diesel who search for a 48RE pressure control solenoid are usually chasing one of a few complaints: the truck will not upshift until high rpm, it shifts erratically or bounces between gears, it stalls when dropped into Drive, or it sets governor and throttle valve codes. Two things are worth knowing before you order. First, the 48RE has no electronic line pressure solenoid like newer transmissions; its electronic pressure control is the governor pressure solenoid and its transducer. Second, this listing is not a loose solenoid. The photo shows a complete remanufactured 48RE valve body with the governor pressure solenoid and transducer assembly and its wiring pigtail already mounted, which covers the solenoid and the worn bores behind it in one part.
The 48RE is the heavy-duty four-speed that replaced the 47RE in diesel Rams from 2003. Its first three shifts are still decided hydraulically, by governor pressure pushing against throttle pressure at the shift valves. The difference from the old mechanical governors is that the PCM creates governor pressure electronically: it pulses the governor pressure solenoid, reads the result through the pressure transducer, and corrects in a closed loop. If the solenoid sticks, the transducer drifts or the governor plug bores wear, the shift valves get the wrong signal and shift timing goes wrong even though the clutches are fine. ATSG data shows the circuit is designed to fall back to roughly 60 psi of governor pressure at idle in Drive when the case connector is unplugged, which is a useful baseline when testing.
Put a 0-100 psi gauge on the governor pressure port and compare it with what the scan tool says the PCM is commanding and reading. A replacement solenoid that still will not hold governor pressure steady points to bore wear in the valve body, which is exactly when a full valve body makes more sense than another solenoid. On 2005 and later trucks, separate throttle valve actuator codes such as P1751 and P1752 from governor faults; Transmission Digest traced many of those to a wrong throttle shaft bracket setting rather than the actuator. Our 48RE governor pressure solenoid guide covers the full test sequence.
This valve body is listed for 48RE transmissions from 2003 to 2008. The 48RE ran behind the Cummins in Ram 2500 and 3500 trucks, and the details changed inside that window: 2003-2004 trucks use a throttle valve cable, while Dodge switched to an electronic throttle valve actuator on the case from 2005. Make sure the throttle lever, pressure regulator bracket and governor connector match your truck, or send us your year and VIN to confirm before it ships. Everything else we stock for this transmission is on the 48RE parts page.
For what else wears out on these transmissions, read 48RE Cummins transmission problems.
| Fits | 48RE 2003-2008 |
| Part type | Pressure Control Solenoid |
| 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.
Not in the sense newer transmissions do. Line pressure is set hydraulically. The electronic pressure control on a 48RE is the governor pressure solenoid and transducer, which this valve body includes.
The photo shows a complete remanufactured valve body with the governor pressure solenoid and transducer assembly mounted. Confirm against your truck or send us your year and VIN before ordering.
Mopar ATF+4. The owner's manual warns that a non-specified fluid can cause poor shift quality and converter shudder.
On a 48RE that pattern usually points to the TCC solenoid on the valve body, because its feed comes from forward clutch oil. A stall in Reverse as well points toward the pump or a restricted cooler.
On 2005 and later trucks with the throttle valve actuator, hold the key on for at least 30 seconds so the ECM can calibrate it. Then adjust bands, check fluid hot and road test.
