47RE Pressure Control Solenoid 1996

A 1996 or later Dodge Ram 2500 or 3500 with the 5.9L Cummins and the 47RE that leaves a stop light in second gear, shifts 1-2 at a different speed every trip, or goes flat on the 2-3 shift while towing usually has a governor pressure problem rather than burnt clutches. This listing is listed as a pressure control solenoid, but what it actually is matters: it is a governor pressure solenoid upgrade that puts a GM-style electronic pressure control solenoid on a machined billet aluminum manifold in place of the factory solenoid. It interchanges with the original 4617210 solenoid, and the kit pictured includes the manifold and solenoid assembly, a manifold gasket and four mounting bolts.

What the pressure solenoid does in a 47RE

The 47RE has no line pressure control solenoid in the way a modern electronic transmission does. Line pressure is still set hydraulically by the pressure regulator valve and throttle valve. The electronics only manage governor pressure, the signal that pushes the 1-2 and 2-3 shift valves up against throttle pressure. The PCM feeds the governor solenoid a duty cycle, and the solenoid works inversely: the more current it gets, the more pressure it bleeds away, so a near-zero command lets governor pressure climb close to line pressure. A transducer on the same governor body reports actual pressure back to the PCM. Around 40 mph the PCM shuts the solenoid off and lets full pressure hold the valves up, which is why a weak governor circuit ruins low-speed shifting while the truck still cruises normally. The PCM also refuses to run the solenoid without a good output speed sensor signal.

Symptoms this upgrade addresses

• Second-gear starts, or a slow roll out of the hole that feels like the truck is lugging
• Early, soft upshifts at light throttle, or late high-rpm shifts that change from cold to hot
• No 2-3 upshift at wide-open throttle, a known failure of weak aftermarket replacement solenoids
• The truck not downshifting as it rolls to a stop, then pulling away in second or third
• Governor pressure codes after the wiring and transducer have checked good, on a truck that has already eaten a factory-style solenoid

How to confirm before you buy

Rule out the cheap causes first. A failed governor pressure sensor, a chafed harness near the solenoid pack, or a dead output speed sensor all produce the same shift complaints, and none of them is fixed by a new solenoid. With a scan tool, compare desired and actual governor pressure, then tee a 0-100 psi gauge into the governor port. Governor pressure should read zero in Park, Reverse and Neutral and at a stop in Drive; pressure there points at the solenoid or a warped, cross-leaking governor body. Our 47RE pressure solenoid symptoms guide walks through the gauge test, and the 47RE valve body testing guide covers worn governor plug bores that imitate a bad solenoid.

Fitment

The listing covers 1996 and later A518 (46RE) and A618 (47RE) units and the 2003-up 48RE, plus the 1994-up A500 (42RE). On the 47RE that means 1996-2002 Ram 2500 and 3500 diesel and V10 trucks with the electronic governor bolted to the valve body. Because the listing spans both the 1996-1999 trucks with the oval-plug governor pressure sensor and the 2000-up trucks with the rectangular one, note that no sensor comes in the box: you reuse yours, so it must be healthy. Rebuilt units and swapped valve bodies do not always match the model year, so drop the pan and look before ordering, or send us your year and VIN. The rest of this family is in our 47RE parts collection.

Install notes

• Drain and drop the pan, pull the filter, unplug the governor connector and remove the factory solenoid housing from the valve body.
• Install the new gasket dry and torque the four bolts evenly so the billet manifold seats flat; a cocked manifold leaks governor pressure.
• Seat the harness connector straight and gently. The manufacturer warns that forcing it at an angle breaks the solenoid connection.
• Refill with ATF+4 only, check the level hot in neutral, clear codes and drive through several full stops so the PCM relearns the sensor zero.
• If you add a performance valve body kit to raise line pressure, the solenoid handles it, but keep pressure within the transducer's range. A valve body detent repair kit is worth installing while the pan is off, and a 1996-1997 solenoid kit covers a tired sensor.

Is this a line pressure control solenoid?

No. The 47RE does not use one. This is a governor pressure solenoid upgrade; line pressure is still set hydraulically by the pressure regulator and throttle valve.

Does it include the governor pressure sensor?

No. The kit is the manifold with the GM-style solenoid, a gasket and four bolts. Your existing sensor plugs back in, so replace it if it has failed.

Will it fit my 2001 Ram 3500 with the 47RE?

Yes, it is listed for 1996 and later 46RE, 47RE and 48RE units with the electronic governor on the valve body. Confirm under the pan, or send us your year and VIN.

Do I need a tuner or PCM reprogramming?

No. The factory PCM drives the solenoid exactly as before. Clear codes and drive through several stops after the install.

Why did my last replacement solenoid fail so fast?

Weak aftermarket governor solenoids are a documented cause of unstable governor pressure and a missing 2-3 shift at full throttle. The heavier GM-style solenoid and solid manifold are aimed at that problem.

What fluid does the 47RE take?

ATF+4. Check the level hot in neutral after the install.

• 47RE Pressure Control (EPC) Solenoid Symptoms
• 47RE Valve Body Problems: Symptoms, How to Test, and Replacement
• 47RE Ram 2500 Cummins Shift Problems: Diagnosis and Fix
• 47RE Ram 3500 Cummins Shift Problems: Diagnosis and Fix