47RE Pump 1996, used and ready to install. Fits the 47RE. Ships fast from the USA.
If your 1996 Ram 2500 or 3500 with the 5.9L Cummins or the 8.0L V10 takes a long moment to pick up Drive or Reverse once it is hot, stalls the engine when you shift into Reverse after a long pull, or whines in step with the tach, a rebuilder who opens the unit often finds a scored pump pocket or a cracked body. This listing is a used original Chrysler front pump, casting 4505031, removed from a 1996 Ram 2500 quad cab Cummins automatic, the same heavy-duty 47RE your truck runs. It is sold as a genuine factory casting for someone doing their own rebuild who would rather start from an OEM body and reaction shaft support than an aftermarket housing.
What you get is shown in the photos: the pump body with its seal bore, the reaction shaft support, the inner and outer gears, the large pump gasket and the attaching bolts, laid out apart so the gear pocket and machined faces can be inspected before you order. It is not a remanufactured, bench-tested assembly; if you want a finished bolt-in unit, look at our rebuilt 47RE lockup pump for 1994-2002 instead.
The 47RE pump is a gear pump driven directly by the converter hub, so it turns whenever the engine runs. Every circuit in the transmission is fed from it: the regulator valve sets line pressure, converter charge and cooler flow come off what is left, and the planetary lube circuit is fed downstream of the cooler. A diesel 47RE asks more of the pump than a gas 46RE because the unit applies the overdrive clutch and the converter clutch with line pressure while the engine is making peak torque at low RPM. Sonnax notes the 46/47RE raises line pressure only 10 to 15 psi in fourth and in third with the converter clutch on, so a pump that has lost volume to wear leaves very little margin under a load.
Do not condemn the pump on symptoms alone. A restricted cooler or plugged return line causes the same hot engagement and lockup complaints. Start with a line pressure test at fast idle: the reading should rise smartly from minimum to maximum, and a bouncing needle with a whine points at a suction leak, cracked filter or bad pickup O-ring rather than the pump itself. Then run the factory flow check by disconnecting the cooler return line and collecting fluid at idle in Neutral; one quart in 20 seconds or less is the pass mark. Our 47RE pump failure guide covers both tests, and the Ram 2500 Cummins 47RE problems guide covers the overdrive and converter faults that are easy to confuse with a pump.
The listing fits the 47RE in 1996 trucks, and the donor was a 1996 Ram 2500 Cummins, so the casting matches the original pump in that truck. The 4505031 body is also listed for the A518/A618 family (46RH/46RE/47RH/47RE), but Chrysler changed reaction shaft supports and stator bushing sizes during the run, and some early supports were non-lockup. Lay your old pump next to the photos and compare the casting number, the stator support and the bushing before ordering, or send us your year and VIN and we will check it. Every 47RE part we carry is on our 47RE parts page.
Clean the pump completely and measure it before it goes in. The 1998 Ram service manual lists 0.0004 to 0.0025 in. gear face clearance to the reaction shaft support, measured with Plastigage, and 0.0035 to 0.0075 in. for both the gear tip and the outer gear to body clearance with a feeler gauge. Reject the pump if the gear pocket is scored or the seal ring lands are worn. Fit a new front seal, pump O-ring and gasket, and a new bushing if the original shows wear, then use alignment studs and torque the bolts evenly so the body is not cocked in the case. The gaskets, seals and bushings come in our 47RE master rebuild kit. Inspect the converter hub for grooves and replace the converter if it is scored, and flush the cooler and lines so old pump debris does not come back. Fill with ATF+4: a 47RE pan service takes about 8 pints, a dry overhaul 29 to 33 pints, then set the level hot on the dipstick. On a 1996 truck it is also the right time to check the governor pressure solenoid and sensor kit while the pan is off.
| Fits | 47RE 1996 |
| Part type | Pump |
| Condition | Used |
| Brand | OEM |
| Reference | 4505031 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Used. It is an original Chrysler pump, casting 4505031, removed from a 1996 Ram 2500 Cummins automatic and photographed disassembled with the reaction shaft support, gears, gasket and bolts. Clean it, measure the clearances and install new seals before use.
The 8.0L V10 and the 5.9L Cummins both used the 47RE in 1996. The listing is for the 1996 47RE, but compare the casting number, stator support and bushing on your old pump with the photos, or send us your year and VIN before ordering.
Often, yes. ATSG traces hot reverse stall on RE units most often to a defective pump, occasionally to a restricted cooler. Do a line pressure test and a cooler flow check (one quart in 20 seconds at idle) to separate the two before you buy.
A new front seal, pump O-ring and gasket, and the pump bushing if worn. Check the converter hub for scoring, and flush the cooler and lines. A full master rebuild kit covers the seals and gaskets if the unit is coming apart anyway.
ATF+4. Chrysler lists about 8 pints for a pan service and 29 to 33 pints for a dry overhaul fill, depending on cooler and lines. Check the level hot on the dipstick.
