47RE Governor Pressure Solenoid 1993-97

An early 47RE that pulls away in second, holds first until the Cummins is out of breath, or bangs into third late is usually telling you about its governor circuit. This listing is a complete heavy-duty solenoid service kit for that circuit, labeled for 1993-1997 and for the 42RE through 48RE family. In the box, per the photo: the governor pressure solenoid, the governor pressure sensor (transducer), the output speed sensor, the overdrive and converter clutch solenoid assembly on its harness and case connector, a pan filter, pan gasket and governor body gasket, plus an upgraded 3-4 accumulator spring, an upgraded lock-up spring and a boost valve spring retainer. The listing cross-references Chrysler numbers 4617210, 04800879, 56041403AA and 52118652 for the main electrical pieces. It is new and ships from the USA.

What the governor pressure solenoid does in a 47RE

Only fourth gear and lock-up are switched electrically on a 47RE. First, second and third are shifted hydraulically, and the signal that moves the 1-2 and 2-3 shift valves is governor pressure. GEARS explains how the computer makes it: the PCM pulses the governor solenoid on an inverse duty cycle, so the less it pulses, the more pressure gets through. Governor pressure should read about zero at a stop and climb roughly one psi per mph up to around 40 mph. The transducer reports the pressure actually produced, and the output speed sensor tells the PCM how fast the truck is moving. GEARS also notes that without a good speed signal the PCM will not run the governor solenoid at all, which is why this kit replaces the solenoid, transducer and speed sensor together.

Symptoms

• Starts in second or third from a stop
• Late, harsh 1-2 or 2-3 shifts, or no upshift until high RPM
• No kickdown on a hill or when passing
• Shift timing that drifts as the truck warms up
• Governor codes P1756 or P1757, or sensor codes P1762-P1764
• No overdrive or no lock-up if the OD/TCC solenoid block or its harness is also bad

How to confirm it before you buy

Scan for codes first, then compare desired and actual governor pressure on a scan tool against a gauge on the governor test port. Pressure that sits high at a stop keeps the shift valves upshifted and gives you a second-gear start. GEARS also documents a replaced aftermarket solenoid that failed straight out of the box, with unstable pressure and no 2-3 shift at wide-open throttle, so recheck pressure after any new solenoid goes in. Our 47RE governor solenoid symptoms guide walks through the gauge test, and the Ram 2500 Cummins shift problems guide covers the other causes of bad shift timing.

Fitment: the 1993-1997 range needs a careful look

The year label is wider than the part. The electronic governor solenoid and transducer only exist on RE-series units with the electronic governor. Ram trucks from the early and mid 1990s built with an RH-series transmission (46RH or 47RH) have a spinning mechanical governor on the output shaft instead, and none of the governor parts in this kit fit them. For a 47RE, the realistic fit here is a 1996-1997 Ram 2500 or 3500. Drop the pan and look: a governor body with a solenoid and a sensor plugged into it means this kit applies. Sonnax identifies the early sensor by its oval connector, used through 1999. Compare each part with what comes out, or send us your year and VIN. For 2000-up trucks, use the 2000 47RE governor solenoid kit instead, and browse everything else on the 47RE collection page.

Install notes

• Drain the pan and remove the filter to reach the governor body under the valve body transfer plate.
• Lube the new O-rings with clean fluid and push the solenoid and transducer straight into the governor body. Torque the governor body screws to 35 in-lb.
• The accumulator spring, lock-up spring and boost valve retainer require pulling the valve body. If you are already that deep, a 47RE shift kit is worth adding for a heavy-towing Cummins.
• Refill with ATF+4, check the level hot in Neutral, clear codes and road test every shift.

Will this fit a 1995 Ram 2500 with a 47RH?

No. RH-series units use a mechanical governor on the output shaft and have no governor solenoid or transducer. This kit only applies to RE-series transmissions with the electronic governor.

What exactly is in the kit?

Governor pressure solenoid, governor pressure sensor, output speed sensor, overdrive and converter clutch solenoid assembly with harness, filter, pan gasket, governor body gasket, 3-4 accumulator spring, lock-up spring and a boost valve spring retainer, per the listing photo.

My Cummins starts in second. Is this the fix?

Often. Governor pressure stuck high at a stop holds the shift valves upshifted. Confirm with a gauge on the governor port or by comparing desired and actual governor pressure on a scan tool.

Do I need to remove the valve body?

Not for the governor solenoid, transducer, speed sensor or filter. The accumulator spring, lock-up spring and boost valve retainer upgrades do require removing the valve body.

What fluid goes back in?

ATF+4. Check the level hot with the engine idling and the selector in Neutral.

• 47RE Pressure Control (EPC) Solenoid Symptoms
• 47RE Ram 2500 Cummins Shift Problems: Diagnosis and Fix
• 47RE Valve Body Problems: Symptoms, How to Test, and Replacement
• 47RE Common Problems and Fixes