JF017E Valve Body 2012-14

The first JF017E CVTs went into production in 2012 for the 2013 model year, behind the 3.5-liter V6 in the redesigned Nissan Pathfinder, the V6 Altima and the Infiniti JX35, which became the QX60 for 2014. If one of those early units now judders on light throttle, bangs into Drive or Reverse, flares the RPM, or sets pressure and ratio codes, a worn valve body is one of the most common reasons. This is a new JF017E valve body for that 2012-14 production window, priced well below a replacement transmission.

What the valve body does in a JF017E

The JF017E (Nissan RE0F10E) runs a steel chain between two variable pulleys, and everything it does is hydraulic. The valve body sets line pressure, squeezes the primary and secondary pulleys hard enough to hold the chain without slipping, applies the forward clutch and reverse brake, and controls torque converter lock-up slip. Compared with the older JF011E there is no stepper motor and no ratio control arm; ratio is held by linear pressure solenoids for line, primary and secondary pressure, plus a select solenoid for forward and reverse engagement and a TCC solenoid for lock-up. Two pressure sensors sit on top of the valve body and report back to the TCM. Four checkballs in the body set how firmly the car drops into gear. A worn bore or a weak sensor anywhere in that chain shows up as a drivability complaint long before the chain or pulleys are damaged.

Symptoms of a worn early JF017E valve body

• Shudder or judder at light throttle and low speed, the complaint Nissan addressed for V6 JX35 and QX60 models with CVT judder codes P17F0 and P17F1
• TCC apply codes, converter shudder or a burnt converter from lock-up control sleeve bore wear
• Harsh or slow engagement into Drive or Reverse
• RPM flare or a feeling of slipping under load because pulley pressure is not holding
• Pressure solenoid or ratio codes with the gearbox dropping into limp mode
• Fluid running hot from internal leakage past worn valves

How to confirm it before you buy

Start with the fluid. Pull a sample and check level and condition; dark, burnt or metallic fluid points toward chain, pulley or pump damage and a larger repair. Scan the TCM and note every code. One trap specific to this unit: the input, primary and secondary speed sensors all use identical three-wire connectors, and swapping two of them during an earlier repair produces pressure solenoid and ratio codes that look exactly like a bad valve body. Confirm the sensor plugs are on the right sensors before condemning anything. Then work through our CVT harsh and delayed shift walkthrough, and read the Jatco CVT Nissan problems guide for how these units usually fail.

Fitment

This valve body is listed for the JF017E built 2012 through 2014. In vehicle terms that covers the first JF017E applications: 2013-2014 Nissan Pathfinder 3.5, 2013-2014 Altima 3.5, the 2013 Infiniti JX35 and the 2014 QX60 with the V6. It does not fit the four-cylinder Altima or Rogue, which use the smaller JF016E. Pressure sensor colors and calibration varied in early production, so match the code on your transmission tag (RE0F10E family) and the part number on the valve body you are removing, or send us your year and VIN and we will confirm. If your vehicle is a 2015 or later Murano, Quest or Pathfinder, look at the later JF017E valve body for 2014-2019 instead. Every JF017E part we carry is listed in our CVT transmission parts collection.

Install notes

• The valve body comes out from underneath after dropping the oil pan; there is no need to pull the transmission.
• Install the small spring before its checkball when transferring parts, because it is easy to lose, and keep the original pressure sensor positions.
• Fill with Nissan NS-3 CVT fluid only, then check the level hot with the procedure for your vehicle.
• Plan on a scan tool that can run Nissan's post-replacement steps for the control valve, including writing calibration data and the relearn, before the road test.
• If your solenoids are original high-mileage parts on a unit you are opening up anyway, our JF017E seven-piece solenoid kit is the companion part, and a full bench rebuild calls for the JF017E overhaul kit for 2012 units.

Which vehicles does the 2012-14 JF017E valve body fit?

The early JF017E applications: 2013-2014 Nissan Pathfinder 3.5 and Altima 3.5, the 2013 Infiniti JX35 and the 2014 QX60 with the V6. The JF017E started production in 2012 for the 2013 model year. Match your valve body part number or send us your VIN to confirm.

Will it fit my four-cylinder Altima or Rogue?

No. Four-cylinder Altima and Rogue models use the JF016E, a smaller unit with its own valve body. This one is for the V6 JF017E only.

My QX60 judders at low speed and has P17F0 stored. Is this the part?

It can be. Nissan issued a bulletin for CVT judder on V6 JX35 and QX60 models with P17F0 or P17F1 stored. Check fluid condition and the bulletin steps first; if the judder remains and the valve body is the cause, this part addresses it.

What fluid goes in after the swap?

Nissan NS-3 CVT fluid. Do not use a universal CVT fluid or a conventional ATF, because pulley clamping and lock-up control depend on the correct friction properties.

Do I need to program anything after installing it?

Yes. Plan on a scan tool that can perform Nissan's control valve replacement steps, including the calibration data write and relearn. Without them, shift feel and pressure control can stay off and codes may return.

Is this new or rebuilt?

It is listed as new, with a 1-year warranty, and ships from the USA.

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