47RE Internal Wiring Harness, new and ready to install. Fits the 47RE. Ships fast from the USA.
On a Ram 2500 or 3500 with the 5.9L Cummins or 8.0L V10, a 47RE that stops shifting into fourth, will not lock the converter on the highway, or throws a solenoid circuit code the moment the truck hits a rough road is often suffering from the wiring inside the pan, not from worn clutches. This is a new internal harness assembly with the overdrive solenoid and converter clutch solenoid already mounted on their bracket, the leads for the governor pressure solenoid and governor pressure sensor, and the round 8-pin plug that passes through the case. It carries part number 52118652, is listed for the 42RE through 48RE family, and ships new from the USA.
The 47RE shifts first through third with hydraulics. The PCM steers those shifts only by setting governor pressure, and it switches two things outright: the 3-4 upshift through the overdrive solenoid and converter lockup through the TCC solenoid. Every one of those signals reaches the valve body through this harness. The factory service manual shows the case connector held to the 3-4 accumulator housing with a shoulder bolt, the harness routed across the valve body, and the solenoid bracket screwed to the valve body. GEARS points out that both solenoids share a single power feed at pin 1 of that round connector, so one cracked wire or a burnt pin can kill fourth and lockup together. On a diesel that tows, losing lockup is more than an annoyance, because a slipping converter turns load straight into fluid heat.
Rule out the outside first. Inspect the external connector and the transmission control relay feed, then unplug the round case connector and read the circuits from the outside of the plug. A reading that goes open or jumps when you wiggle the connector, or a feed that disappears at pin 1, points inside. Drop the pan, flex each wire run while watching the meter, and look for chafing where the harness crosses the accumulator cover and for heat damage at the plug. If the solenoids and the wiring are both sound, check cooler flow before blaming electrical parts; restricted coolers are a common cause of lockup complaints on high-mileage Cummins trucks. Our 47RE common problems guide covers the full electrical and cooler checks, and the governor pressure solenoid guide separates harness faults from solenoid and sensor failures.
The listing covers the RE family with the round 8-pin case connector: 42RE, 44RE, 46RE, 47RE and 48RE. On the heavy-duty side that is the 47RE in 1993-2003 Dodge Ram 2500 and 3500 trucks with the 5.9L Cummins or 8.0L V10. The detail that changes between years is the governor pressure sensor plug. Sonnax notes that 1999-and-earlier units used a sensor with an oval connector, while 2000-up units use a rectangular plastic sensor. Before ordering, compare the sensor connector in our photo to the one on your valve body, or send us your year and VIN and we will check it for you. Browse every 47RE part on the 47RE collection page.
If the governor side is suspect, replace it at the same time with a 47RE governor pressure solenoid. A worn detent spring and ball can also cause gear range problems on these trucks, which the 47RE valve body detent repair kit fixes while the pan is already off.
| Fits | 47RE |
| Part type | Internal Wiring Harness |
| Condition | New |
| 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.
Yes. The overdrive solenoid and the converter clutch solenoid come mounted on the bracket with the internal wiring and the round 8-pin case plug. The governor pressure solenoid and sensor are separate parts; the harness only has the leads that plug into them.
The case plug is the same round 8-pin design across the RE family. What changes is the governor pressure sensor plug: 1999-and-earlier units use an oval sensor connector and 2000-up units use a rectangular plastic sensor. Compare the sensor plug in our photo to yours, or send us your year and VIN and we will confirm it.
The common ones are P0743 for the TCC solenoid circuit, P0753 for the 3-4 shift solenoid circuit, P0748 for the governor pressure solenoid circuit, and P1763 or P1764 for governor sensor voltage. When those codes return with good solenoids, the harness or case plug is the usual suspect.
ATF+4. Check the level hot, engine running, in Park. Do not top off with a generic multi-vehicle fluid on a 47RE.
No. The harness and solenoid bracket come off with the pan and filter removed. Take out the case connector shoulder bolt, unplug the governor leads, and unscrew the bracket from the valve body.
