Fleece Performance 11-24 Dodge Ram 4500/5500 Cab & Chassis Cummins PowerFlo Lift Pump (52 Gal)

A Ram 4500 or 5500 chassis cab with the 6.7L Cummins usually works hard for a living: a dump body, a service bed, a hauler deck. When the truck cranks too long in the morning, falls on its face pulling a loaded grade, or sets a low rail pressure code, the in-tank lift pump is a prime suspect. The Fleece Performance PowerFlo FPE-PF-CUMM-1124-CCOA is a complete replacement module for the rear tank that sits over the axle on 2011-2024 Ram chassis cabs.

What the lift pump does in a 6.7 Cummins chassis cab

The engine-mounted high pressure pump builds rail pressure, but it relies on the in-tank pump to push fuel forward through the filter and keep it supplied. On a chassis cab the tank sits a long way from the engine, so a tired factory pump shows up fast under load. The PowerFlo runs two gerotor pump sections in one assembly and Fleece rates it to support up to 800 hp. Its active fill bucket keeps the pickup covered as the level drops, so the truck does not starve below a quarter tank. Fleece lists operating pressure at 18-20 psi at idle.

Symptoms of a failing lift pump on a Ram 4500/5500

• Extended crank before the engine fires, worst after sitting overnight or in the cold
• Power that fades on a long loaded pull and returns when you back off
• Low rail pressure code P0087 with no leak or injector problem found
• Stumbling or a dead pedal that only happens when the rear tank is low
• A pump that no longer hums at key on, or a loud whine from the tank area

How to confirm before you buy

Start with a new fuel filter and drain the water separator, since a restricted filter mimics a weak pump. Then put a gauge on the supply side and compare idle and loaded readings, and log desired versus actual rail pressure with a scan tool. If supply falls with a clean filter, the pump is the problem. A truck that loses power with no fuel codes at all may have a transmission issue instead; most of these trucks run the Aisin, and our AS69RC problems and service guide covers what to check.

Fitment

This listing covers 2011-2024 Ram 4500 and 5500 cab and chassis trucks with the 6.7L Cummins, rear over-axle tank only. Fleece states it replaces OE part number 68064420AA in that tank. A few points to check before ordering:

• Fleece names the tank as 52 gallon in the product title and 50 gallon in its application notes. Both refer to the same rear over-axle tank.
• Trucks with the midship tank use a different module, the PowerFlo for the 22 gallon midship tank. Trucks with both tanks need one of each if you are replacing both pumps.
• It is for cab and chassis trucks only. Pickups take the 2011-2024 Ram pickup PowerFlo FPE-34562.

Upfits vary a lot on these trucks, so compare the number on your old module to 68064420AA, or send us your year, VIN and tank setup and we will confirm. More driveline parts for these trucks are on our Aisin transmission parts page.

Install notes

• Fleece estimates about three hours. Run the tank low first; the rear tank is held to its tray by eight bolts, four front and four rear, and some bodies need extra parts removed to drop it.
• Lower the tank a few inches to unplug the harness and fuel lines before taking it down. On trucks with a midship tank, the transfer line also disconnects here.
• Clean the top of the tank before pulling the locking ring so dirt does not fall in. The kit includes a new tank flange O-ring and level sender float arm; clip the arm on carefully, because a damaged float or resistor card gives a wrong fuel gauge reading.
• If the truck has a midship transfer system, the kit includes a 5/16 inch quick disconnect fitting for the transfer line port on the PowerFlo cap.
• The factory water-in-fuel sensor, fuel heater and fuel lines stay in place. The outlet and return also accept a -8 O-ring fitting (3/4-16 thread) for custom lines.
• Before the first start, cycle the key on for five to six seconds and off again three or four times to prime, then check for leaks. Fleece validates PowerFlo pumps up to B20 biodiesel.

Working trucks run the transmission hot too. While the truck is on the lift, a BD deep sump AS69RC pan adds fluid capacity on 2013-2024 Aisin trucks, and our Aisin overheating prevention guide covers the rest.

Which tank does this pump go in?

The rear tank that sits over the axle on 2011-2024 Ram 4500 and 5500 cab and chassis trucks. Fleece says it replaces OE part number 68064420AA in that tank. The 22 gallon midship tank uses a different PowerFlo module.

Is it a 50 or 52 gallon tank?

Fleece uses both numbers for the same rear over-axle tank: 52 gallon in the product title and 50 gallon in the application notes. If your truck has the rear tank over the axle, this is the module for it.

Will it fit my 3500 pickup?

No. This module is for cab and chassis trucks only. Ram 2500 and 3500 pickups from 2011-2024 use the PowerFlo FPE-34562.

What fuel pressure should I see after install?

Fleece lists 18-20 psi at idle for this pump.

My truck has a midship transfer tank. Does that change the install?

Yes. You disconnect the transfer line when lowering the rear tank, and the kit includes a 5/16 inch quick disconnect fitting that goes into a port on the PowerFlo cap so the transfer line can be reconnected.

Do I keep the factory fuel heater and water sensor?

Yes. The PowerFlo retains the factory water-in-fuel sensor, fuel heater and fuel lines.

• Aisin AS69RC Problems and Service Guide
• 68RFE vs Aisin AS69RC Differences
• Aisin Overheating Prevention
• Aisin Slipping Under Load