48RE Pressure Control Solenoid 1996-99, new and ready to install. Fits the 48RE. Ships fast from the USA.
A late-1990s Ram that pulls away in second, will not climb into overdrive on the interstate, or runs hot pulling a camper because the converter never locks is a classic case for this set of parts. The listing calls it a 48RE pressure control solenoid for 1996-99, but no 48RE was built in those years and the RE family has no line pressure control solenoid. A 1996-1999 Ram 1500, 2500 or 3500 carries a 46RE behind the gas V8s or a 47RE behind the 5.9L Cummins and the V10. The photo shows the electrical heart of those transmissions in Mopar packaging: the overdrive and lockup solenoid block with its braided harness, a governor pressure solenoid, and a governor pressure sensor with the earlier round-bodied plug that pre-2000 trucks use.
Chrysler moved the RE units from a spinning mechanical governor to an electronic one, and these parts are that system. The governor pressure solenoid bleeds line pressure down to whatever governor pressure the PCM asks for, and that pressure is what shoves the 1-2 and 2-3 shift valves over. The sensor reads the resulting pressure and reports it to the PCM, which trims its command to match. The solenoid block on the valve body is a separate system with two coils: one releases the 3-4 shift, the other applies the converter clutch. When governor pressure is low or stuck, the truck feels lazy and starts in a higher gear. When the block or its harness fails, first through third can feel perfect while fourth and lockup simply never happen.
Start with power. The solenoids are fed through a transmission control relay that the PCM only turns on once the engine runs, so check that feed with the engine running before calling any solenoid dead. Next, watch desired versus actual governor pressure on a scan tool and compare it with a low-range gauge on the governor pressure port; Sonnax recommends a 0-100 psi gauge because a high-range gauge cannot resolve those small numbers. Pressure that will not follow the command means the solenoid or its feed. A gauge that agrees with the command while the scan tool reads wrong means the sensor. Missing fourth or lockup with good governor numbers sends you to the solenoid block. Our Ram 2500 shift problems guide and governor pressure solenoid guide have the full test sequence.
This set is for 1996 through 1999 RE-family Rams with the electronic governor and the early sensor plug. Sonnax's valve body identification places the change to the rectangular plastic sensor connector at the 2000 model year, so a 2000-up truck should use the 2000 version of this set instead. The listing also notes an A500 reference, the earlier name for the lighter 42RE/44RE; send us the VIN if that is your unit. A rebuilt transmission or swapped valve body can carry parts from a different year, so lay your old sensor and solenoid block beside the photo before you order, or give us the year and VIN and we will check. Every RE-family part we stock is on the 48RE collection page.
All of this work is done through the pan. Drain, drop the pan and pull the filter. Unplug the sensor and solenoid, then unbolt the governor body and its retainer plate from the transfer plate. The sensor comes out after its M-clip is pried loose, and the solenoid pulls straight from its bore. Install both with new O-rings wetted in ATF. The solenoid block screws to the valve body, and its case connector is held by a shoulder bolt at the 3-4 accumulator housing that you must reuse. Governor body screws go to 35 in-lb. Finish with the line pressure and throttle pressure adjustments, then fill with ATF+4. Because the pan is already off, a complete solenoid kit with filter and pan gasket saves a parts run, and if only the lockup side is bad the overdrive and lockup solenoid assembly is sold on its own.
| Fits | 48RE 1996-99 |
| Part type | Pressure Control 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.
A 1997 Ram 2500 with the Cummins has a 47RE, which uses this governor solenoid, sensor and overdrive/lockup solenoid block layout. Confirm your sensor has the early round-bodied plug, not the rectangular 2000-up style.
It is a naming carryover. The 48RE came later, and the RE family uses a governor pressure solenoid and sensor instead of a line pressure control solenoid. The parts in the photo are the 1996-99 governor and lockup electrical parts.
Yes. If the PCM sees a governor pressure or sensor fault it can default to a fixed gear. Check codes P1756, P1757 and P1762 to P1764 and compare scan tool readings against a gauge.
The photo shows the solenoid block, governor solenoid and governor sensor. If you want a filter and pan gasket in the same box, choose the complete solenoid kit.
Refill with ATF+4, then perform the line pressure and throttle pressure adjustments from the service manual and road test while watching governor pressure.
