48RE Governor Pressure Solenoid 1996-99, new and ready to install. Fits the 48RE. Ships fast from the USA.
If your 1996, 1997, 1998 or 1999 Dodge Ram holds first gear until the engine is screaming, takes off in second or third, refuses to downshift when you floor it, or has a P1756 or P1757 governor code stored, the governor pressure solenoid is the part at the center of that complaint. This listing carries a 48RE name because the whole RE family shares the electronic governor design, but a truck from these years actually has a 46RE behind the gas V8s or a 47RE behind the 5.9L Cummins and the 8.0L V10. The 48RE arrived for 2003. The photo shows a Mopar-boxed set: the governor pressure solenoid, the early round-plug governor pressure sensor and the overdrive and converter clutch solenoid assembly with its harness, so the pan only has to come off once.
Older TorqueFlites used a spinning weight governor on the output shaft. These trucks replaced it with an electro-hydraulic one. The solenoid sits in a small governor body bolted under the valve body transfer plate. Line pressure enters one side and the solenoid bleeds it down to governor pressure on the other, and that pressure is what pushes the 1-2 and 2-3 shift valves over against throttle pressure. The 1998 Ram service manual describes it as a duty-cycle solenoid: one amp of average current gives zero governor pressure and zero amps gives maximum, with the PCM switching the ground side and a transmission control relay supplying 12 volts. The sensor next to it reads the result and reports back so the PCM can trim the command, and four governor curves (cold, normal, wide open throttle and 4-Lo) shape the shift points.
Scan for codes first, then put a 100 psi gauge on the governor pressure port with the rear wheels free to turn. The factory test is simple: at curb idle with the brakes on, governor pressure must be no more than 3 psi, and as speed rises it should climb smoothly at about 1 psi per mph, then fall back to 3 psi or less when you stop. High pressure at idle points to the solenoid system; low pressure at every speed points to the solenoid, the sensor or the PCM. Check the 12-volt supply relay and the case connector before condemning parts. Also know that worn governor plug bores in the valve body leak governor oil and produce the same late or erratic shifts, which a new solenoid will not fix. Our RE overdrive and TCC solenoid testing guide covers the companion circuits.
This set is listed for 1996-1999 RE-family transmissions with the early electronic governor and the round-bodied sensor plug. In practice that means 1996-1999 Ram 1500, 2500 and 3500 trucks with the 46RE or 47RE; the listing also names the lighter 42RE and 44RE units, which use the same style of governor parts. Trucks from 2000 on moved to a later sensor style, so a 2000-2002 Ram or any true 48RE should start with the 2000-up governor pressure solenoid instead. Compare the sensor connector shape against your old part, or send us your year and VIN and we will confirm it. Browse every RE-family part on the 48RE collection page.
The governor body is reached from underneath with the pan and filter off. Unplug the solenoid and sensor, remove the governor body screws and retainer plate, slide the sensor out after releasing its M-shaped clip, and pull the solenoid straight out of its bore. Fit new O-rings lubricated with clean fluid, push the solenoid in until it snaps home, keep its connector in the retainer cutout and torque the governor body screws to 35 in-lb. Chrysler originally called for ATF+3 in these trucks; Mopar ATF+4 is the current replacement fluid. Since the pan is already down, a solenoid kit with filter and pan gasket saves a second trip, and the ATSG RE-family rebuild manual is worth having if the valve body needs to come out. Road test afterward and confirm the 1-2 and 2-3 shift points come back where they belong.
| Fits | 48RE 1996-99 |
| Part type | Governor Pressure Solenoid |
| Condition | New |
| Brand | OEM |
| Reference | A500 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Not as a matched set. This is the 1996-1999 version with the early round-plug governor pressure sensor. Trucks from 2000 on, including every 48RE, use the later sensor style. Look at the 2000-up governor pressure solenoid listing or send us your VIN and we will point you to the right part.
It is one of the top causes. If the solenoid sticks and governor pressure stays above about 3 psi at a stop, the shift valves never return to first. A governor pressure gauge test, plus checking for P1757, confirms it before you spend money.
P1756 sets when the PCM commands 15-20 psi of governor pressure and the sensor reads outside roughly 10-25 psi. P1757 sets when the PCM asks for zero but the sensor sees more than 3 psi in gear at 0 mph. Both point at the governor pressure system, which includes this solenoid, the sensor and the wiring.
No. The governor body bolts to the underside of the transfer plate, so with the pan and filter off you can unplug it, remove the governor body, and swap the solenoid and sensor. Use new O-rings and torque the screws to 35 in-lb.
These trucks originally called for Mopar ATF+3. ATF+4 is Chrysler's current replacement for it. Check the level hot with the engine idling and the selector in Neutral.
