JF011E Pump

If your Altima, Rogue, Sentra, Dodge Caliber or Mitsubishi Outlander with the JF011E (RE0F10A) CVT is slow to pick up Drive or Reverse when hot, flares engine RPM without matching road speed, or has a whine that rises and falls with the engine, the transmission may be running short of oil volume. This is a new oil pump assembly in genuine Nissan packaging, as shown in the photo, for a rebuild where the pump has been inspected and condemned.

What the oil pump does in a JF011E

A conventional automatic uses pump pressure mainly to apply clutches. A belt CVT leans on it much harder. In the JF011E the pump feeds the primary and secondary pulley pistons, and that pressure is the only thing clamping the steel push belt between the pulley faces. It also feeds the forward clutch and reverse brake, the torque converter and lockup circuit, and the lube and cooling flow. When pump output falls off, the valve body cannot hold enough clamping force, the belt slips on the sheaves, and slip marks score the pulley faces quickly. That is why a tired pump on this unit does more damage than it would in a stepped automatic.

Pump output is managed by a pump flow control valve. Sonnax lists that valve as a critical wear point on the JF011E and ties its wear to push belt slippage, delayed engagement and low pump volume, so the valve and its bore need to be checked alongside the pump itself.

Symptoms of low pump output

• Delayed engagement into Drive or Reverse, usually worse once the fluid is hot
• RPM flare or a slipping feel on acceleration, especially from a stop or up a grade
• Whine that tracks engine speed rather than vehicle speed
• Chatter or surge on acceleration as secondary pulley pressure drops out
• Fluid pressure codes and a fall into fail-safe mode with reduced power
• Metallic sludge in the pan and on the magnets, which points to pulley and belt damage already under way

How to confirm before buying

A new pump will not save a unit whose pulleys are already scored, so check before ordering. Scan for stored codes and look at live primary and secondary pressure data if your tool reads them. Pull the pan and inspect the magnets and the debris: fine paste is normal wear, but chips, slivers or belt element fragments mean the belt and pulleys need attention too. Vacuum test the pump flow control valve bore and the secondary pulley control valve; worn bores bleed off pressure and mimic a weak pump. Our Jatco CVT problems and fixes guide walks through the common Nissan failures, and the CVT slipping under load guide covers telling a pressure problem from a worn belt.

Fitment

The listing is for the JF011E, which Nissan calls the RE0F10A and Mitsubishi calls the F1CJA. It was used behind four-cylinder engines in the Nissan Altima 2.5, Rogue, Sentra 2.0, the Dodge Caliber and Jeep Compass and Patriot with the CVT, and the Mitsubishi Outlander and Lancer. No model years are given on this listing, and Nissan revised internal parts during the production run, so compare the part number and casting on your old pump with the photo, or send us your year and VIN and we will confirm before it ships. It is not for the larger V6 CVTs or the later JF015E and JF016E units. Browse every related part on our CVT parts collection.

Install notes

• This is a transmission-out job. Fit a new front seal and gaskets, check the converter hub for scoring, and make sure the pump drive engages fully before the case halves come together.
• Prime the pump with fluid during assembly so it picks up oil on the first start.
• Service the valve body at the same time. Replacing the pump without addressing a worn flow control valve bore leaves the same pressure loss in place; our JF011E valve body with filter kit covers that side.
• If the debris check showed belt or pulley damage, a JF011E overhaul kit and a new push belt belong in the same rebuild.
• Flush or replace the cooler, since debris trapped in it will go straight back into the new pump.
• Fill only with Nissan NS-2 CVT fluid, set the level at the specified temperature, and run the scan tool reset and learn procedure for your vehicle before the road test.

Sold new with a 1-year warranty and shipped from the USA.

Which vehicles use the JF011E CVT?

The JF011E (Nissan RE0F10A, Mitsubishi F1CJA) was used in four-cylinder Nissan Altima, Rogue and Sentra models, the Dodge Caliber, Jeep Compass and Patriot with the CVT, and Mitsubishi Outlander and Lancer models. Send us your year and VIN and we will confirm the pump fits before shipping.

Will a new pump fix belt slip on my CVT?

Only if low pump output is the cause and the belt and pulleys are still in good shape. Worn pump flow control or secondary pulley control valve bores in the valve body cause the same symptoms, and a scored pulley will keep slipping. Inspect the pan debris and vacuum test the valve body before deciding.

What else should I replace with the pump?

At minimum a front seal, gaskets, a filter and fresh fluid. Most rebuilders also service the valve body at the same time and flush or replace the cooler. If you find metal from the belt or pulleys, plan on an overhaul kit and a push belt as well.

What fluid does the JF011E take?

Nissan NS-2 CVT fluid. Do not use a conventional ATF or a generic multi-vehicle fluid; the push belt depends on the correct friction properties to grip the pulleys.

Is a relearn needed after replacing the pump?

Yes. After a rebuild or major repair on a Nissan CVT, clear the codes and run the reset and learn procedure for your vehicle with a capable scan tool, then road test while watching live data.

Is this pump new or rebuilt?

It is a new part in genuine Nissan packaging, as shown in the listing photo, and it carries a 1-year warranty.

• JATCO CVT Nissan Problems and Fixes: The Complete Shop Guide
• CVT Slipping Under Load: Root Causes and Fixes
• CVT Harsh or Delayed Shifts: A Diagnostic Walkthrough
• CVT Limp Mode: Causes and How to Diagnose It