Replaces the worn charge pump on a Jatco JF015E CVT so line pressure comes back up and the steel belt stops slipping under load.
A Sentra, Versa or Versa Note CVT that whines with engine speed, slips when it gets hot, or throws pressure codes is often short on oil pressure, not short on belt. This is the oil pump assembly for the Jatco JF015E, the RE0F11A in Nissan applications, and it comes with the pressure valve kit installed alongside the pump body rather than as a bare housing. It replaces OE numbers 31705-X428B, 31705-X428C, 31705-X428E, 31705-X427D, 31705-X427E, 31340-3JX0A and 31340-3JX0B.
Every job in this transmission runs on pump output. The pump feeds the valve body, where the line pressure solenoid and primary pressure solenoid meter oil to the primary and secondary pulley pistons. Those pistons squeeze the steel push belt, and on this unit pulley pressure can reach around 850 PSI. The same supply applies the low brake, high clutch and reverse brake in the auxiliary gearbox and feeds the torque converter and lube circuits. Jatco moved ratio control from a stepper motor to those two pressure solenoids on the CVT7 design, so this unit depends on stable, regulated pump pressure for every ratio change. Inside the pump is a flow control valve that regulates output; on Jatco CVTs that valve and its bore are a well-documented early wear point, and once the bore is worn the regulated pressure wanders.
Scan for codes and look at commanded versus actual pressure data if your tool supports it, then check fluid level and condition. A whine that follows vehicle speed instead of engine speed points at bearings or the auxiliary gear set rather than the pump. Our CVT harsh and delayed shifts guide covers the engagement checks, and the Jatco CVT Nissan problems and fixes guide explains how pump and valve body wear show up on these units. If the valve body bores are worn too, replace the valve body at the same time instead of chasing pressure twice.
The listed Nissan applications are the 2013-2019 Sentra 1.6L and 1.8L, 2012-2019 Versa and Versa Note 1.6L, and 2013-2015 NV200 1.5L, plus the Cube, March/Micra 1.2L, Tiida, Sylphy, Note and AD Van in the markets that used this CVT. It also covers the Mitsubishi versions of the same CVT7 box: 2013-2015 Lancer, Attrage, RVR/ASX 1.8L and eK-Wagon. Many of those Cube, Tiida, Sylphy and Mitsubishi entries are non-North-American models, so match the old pump's part number from the list above or send us your year and VIN before ordering. Other JF015E parts are on the CVT transmission parts page.
If you are rebuilding the whole unit, pair the pump with the JF015E master rebuild kit and check the JF015E valve body with solenoids if the valve body bores show the same wear.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It replaces 31705-X428B, 31705-X428C, 31705-X428E, 31705-X427D, 31705-X427E, 31340-3JX0A and 31340-3JX0B. Matching the number on your old pump is the surest fitment check.
The flow control valve and its bore are a known wear point on Jatco CVTs, and debris from a belt or pulley failure scores them. Reusing the old valve in a new pump can bring the same low or unstable pressure right back.
No. The pump is mounted inside the case, so the CVT has to come out and be disassembled on the bench.
Genuine Nissan NS-3 CVT fluid. Prime the pump with it during assembly and use it for the refill.
Yes. Reset the CVT fluid deterioration value and run the clutch point relearn. Check the factory service information for any other resets your model requires.
