Replaces the worn primary and secondary pulleys plus the 29-tooth steel push belt in a Jatco JF015E CVT, the wear pair behind judder and slip.
If a Nissan Versa, Sentra, Note or Juke, or a Mitsubishi Mirage, has started to slip, judder from a light or flare as it pulls through the gears, and the teardown shows a marked belt or scored cone faces, the parts you need are the variator itself. This set gives you the primary pulley, the secondary pulley and the steel push belt for the Jatco JF015E, which Nissan tags RE0F11A and Mitsubishi calls F1CJB. It is the 29-tooth version, manufacturer part number JY-Q12V0009, and weighs 19.8 lb before packing.
The JF015E is the smallest of the Jatco CVTs. Instead of gears, the engine turns the primary pulley through the torque converter, the belt carries that torque across to the secondary pulley, and hydraulic pressure squeezes one sheave of each pulley in or out to change the diameter the belt rides on. A small auxiliary gearbox behind the secondary pulley adds a low and high range, which is why ATRA's tech line calls this unit the Jatco Power Glide. It changes from low to high at roughly 27 mph. Gears Magazine reports the pulleys can see as much as 850 psi of clamp pressure, so once the belt slips and glazes the sheave faces, the slip feeds on itself.
The wear is not always visible on the cone faces. Each pulley slides on internal balls and rollers that keep it from spinning on its shaft, and those wear. The primary pulley carries a pressed-on piston that can work loose, go egg-shaped and cross-leak. The secondary pulley carries the speed sensor reluctor, which is also a press fit and often comes loose. A complete pulley pair takes all of those wear points out of the equation at once.
Rule out the hydraulics first, because they cause the same complaints. Gears Magazine names the pump flow control valve as the most common failure on all Jatco CVTs, and Sonnax documents a worn lockup control plunger valve and sleeve on the JF015E that gives rising RPM under acceleration, no lockup and ratio codes. Also remember this unit applies its converter clutch as low as 12 mph, which drivers often mistake for a shift. Our CVT slipping under load guide and Jatco CVT problems and fixes guide walk through the checks in order. If the sheaves are clean and the belt is unmarked, a JF015E valve body with filter kit may be the real repair.
This set is listed for the JF015E / RE0F11A small-car family: Nissan Versa, Sentra 1.8, Note, Juke, Cube, Micra, March, Sunny, NV200 and Qashqai 1.6; Mitsubishi Mirage, Attrage, Lancer and Galant Fortis; the Suzuki Alto; and the Chevrolet Spark 1.0. The deciding detail is the tooth count. The JF015E was built with both 29-tooth and 30-tooth primary pulleys, and they do not swap. Count yours before ordering, or send us your year and VIN and we will check it. Every part for this family is on our CVT parts page.
This is a bench job with the case split. Lift the old pulleys and belt out together and keep the new ones together; never run a fresh belt on old sheaves or the reverse. While the unit is open, fit new pulley bearings from a JF015E pulley bearing kit, pull and inspect the pump flow control valve, and clean every valve body bore, since belt debris settles there. Refill with Nissan NS-3 CVT fluid and set the level hot. Finish with the TCM resets and the Clutch Point Relearn, which ATRA calls a must on any repaired JF015E; skipping it leaves surge and flare at the range change even with perfect hard parts.
| Transmission | |
| Tooth Count | |
| Manufacturer Part Number | |
| OEM Part Number | |
| Exterior | |
| Item Weight | |
| Package Dimensions | |
| Includes |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Count the teeth on the primary pulley of the unit you removed. The two designs look alike but do not interchange. This set is the 29-tooth version. If you count 30, use the 30-tooth master kit instead, or send us your year and VIN.
The primary pulley, the secondary pulley and the steel push belt, listed as manufacturer part number JY-Q12V0009. Bearings, filters and seals are not included.
Only if the sheave faces are perfectly smooth and the internal balls, rollers, primary piston and secondary reluctor all check out. Once a belt has slipped, the cone faces are usually marked, and a new belt on marked sheaves wears out quickly.
Nissan NS-3 CVT fluid, with the level checked hot. Then run the TCM resets with a scan tool and finish with the Clutch Point Relearn so the low-to-high range change does not surge or flare.
No. Those use the larger JF016E/JF017E units with different pulleys. This set is only for the small JF015E / RE0F11A, so check the tag on your case.
