On this page
- The one-line answer
- Two generations of one idea
- JF015E and JF020E side by side
- How 7.3 becomes 8.7
- Which cars have which
- What does not interchange
- What does interchange
- Telling them apart in two minutes
- Why the trade argues about RE0F11B and RE0F12A
- What to send, and what comes back
- Sources and frequently asked questions
This pair causes more confusion than any other comparison in the JATCO CVT range, because the trade files them under overlapping names. The same vehicle badge switched generations mid-life; the same six-solenoid valve body is catalogued as RE0F11B in one catalogue and RE0F12A in another; and both units drink the same fluid. Here is the comparison we use on the bench, with the arithmetic that reconciles the two ratio figures.
What this page gives you
- The side-by-side specification table, with the figures that are documented and a clear note where the trade disagrees.
- How 7.3 becomes 8.7 — the ratio arithmetic, so you can sanity-check any claim you read anywhere else.
- A generation table of the nameplates that switched from one unit to the other mid-life.
- What does not interchange (most of it) and what genuinely does (less than buyers hope).
- The two-minute identification that separates them without dropping the pan.
01The one-line answer
If you only read one line: the JF020E is not a revised JF015E, it is the wide-ratio development of the same small-CVT concept, and it was introduced to widen the ratio spread for fuel economy on small-displacement cars. If your housing stamp starts with 50 you have the wide-ratio unit and the JF015E pages on this site do not apply to your valve body, pulley set, belt or pump. If it carries X42 or 3JX, you have the JF015E.
02Two generations of one idea
Both units are built on the same architectural decision, and it is the decision that makes them different from every other CVT in this class: a small steel push belt driving a two-speed auxiliary planetary gearbox, packaged transversely for front-wheel drive. The variator supplies an infinite ratio within a band; the planetary set gives the transmission two bands to switch between.
That architecture is why a 1.6-litre car can cruise at low engine speed and still pull away from rest without a torque converter doing the work. It is also why both units share the same failure signature — a variator that has to cover a lot of ratio with a narrow belt, and an auxiliary gearbox that takes the torque multiplication.
The JF015E is the original CVT7. The JF020E is the wide-ratio revision: the same concept, with the belt and pulley system redesigned, the oil pump simplified, and the variator span pushed further into overdrive — all of it aimed at fuel economy on small engines. It was developed and is built by JATCO's Guangzhou plant for the Chinese market, which is why it is far better known in Asia than in North America.
03JF015E and JF020E side by side
| Specification | JF015E (CVT7) | JF020E (CVT7 W/R) |
|---|---|---|
| Family | JATCO CVT7 | JATCO CVT7 W/R (Wide Range) |
| Nissan designation | RE0F11A | RE0F11B — also catalogued as RE0F12A; see the note in section 09 |
| Auxiliary gearbox | Two-speed planetary | Two-speed planetary, ratios 1 and 1.821 |
| Pulley ratio span | 2.200 – 0.550 | 2.200 – 0.458 |
| Overall ratio coverage | 7.3 | 8.7 |
| Documented torque class | 150 Nm class | 156 Nm class, engines up to 1.6L |
| Belt and pulley system | Original design | New belt and pulley system |
| Oil pump | Original design | Simplified pump design |
| Valve body | 31705-X429B/C/D (US), 31705-3JX8A (international) | 31705-50X0B — six solenoids |
| Fluid | Nissan CVT fluid NS-3 | Nissan CVT fluid NS-3 |
| Main production | JATCO plants in Japan, China, Thailand, Mexico | JATCO Guangzhou |
Figures for the JF015E are the documented values used throughout this site's JF015E reference cluster. JF020E figures are taken from published manufacturer-facing and industry technical descriptions of the CVT7 W/R. Where a published figure varies between sources we mark it rather than choosing silently.
04How 7.3 becomes 8.7
Two numbers get quoted for these transmissions and they are easy to confuse: the pulley ratio span (what the variator alone can do) and the overall ratio coverage (what the gearbox delivers at the wheels, after the auxiliary set). The second is the first multiplied by the auxiliary gearbox ratio.
JF020E: pulley span 2.200 ÷ 0.458 = 4.80. Multiply by the auxiliary overdrive ratio 1.821 → 8.75, published as 8.7.
JF015E: pulley span 2.200 ÷ 0.550 = 4.00. Multiply by the same 1.821 → 7.28, published as 7.3.
Both reconcile to the published coverage figures to within rounding. That is the entire difference between the two transmissions stated as one line of arithmetic: the variator reaches further into overdrive, so the gearbox covers more ground. The 0.550 → 0.458 change looks small on paper and is worth roughly a fifth more total ratio spread.
This is worth internalising because it tells you where the difference physically lives. Nothing about the auxiliary gearbox changed. Everything about the variator changed — which is exactly consistent with what the trade says about the W/R: new belt, new pulley system, simplified pump to reduce the parasitic losses of moving fluid the wider span needs.
05Which cars have which
The complication for buyers is that the nameplate did not change when the unit did. These are the transitions that catch people, stated as generation changes rather than as one flat list:
| Nameplate | Earlier generation | Later generation | What changes for you |
|---|---|---|---|
| Nissan Versa | N17, 2015–2018 — JF015E | N18, 2019 onward — JF020E | Valve body, pulley set, belt and pump. Same badge, different gearbox. |
| Nissan Kicks | — | 2018–2019 1.6L — JF020E (stamp 50X1A / 50X5A) | A "Kicks CVT" search leads to JF020E parts, not JF015E. |
| Nissan Sylphy | B17, 2015–2019 | B18, 2019 onward | Generation break falls inside the same nameplate. |
| Nissan Tiida / Note / Lannia / Venucia D60 | Earlier Tiida builds — JF015E | Later builds — JF020E | The badge is not enough; read the housing. |
| Mitsubishi Mirage / Attrage, Suzuki Swift family, Chevrolet Spark | JF015E throughout | — | These applications stay on the JF015E, which is why the JF015E is still a high-volume service part worldwide. |
One practical consequence: the JF015E is not the obsolete unit and the JF020E is not simply "the newer one". Both are in volume service today, in different markets. For the full JF015E application list including the wide-ratio exceptions, see the application and year chart.
06What does not interchange
This is the section buyers skip and then return to. Treat every line as a separate part you must not order across the gap:
| Component | Interchange? | Why |
|---|---|---|
| Valve body | No | Six solenoids and a different calibration. 31705-50X0B is the wide-ratio unit; no JF015E number crosses to it. |
| Push belt | No | The W/R is specified with a new belt and pulley system. Fitting the wrong belt into the wrong variator is not a marginal error. |
| Pulley set | No | Different cone geometry to reach 0.458. The primary pulley also differs by tooth count within the JF015E itself — 29 versus 30 teeth — before you even cross families. |
| Oil pump | No | The W/R pump was simplified as part of the efficiency work. |
| Control calibration | No | Different ratio span means a different control strategy. This lives in the TCM, not in the part you bolt on. |
| Fluid specification | Yes | Both are NS-3. This is the one shared item, and it is the reason owners assume more is shared than is. |
The two units share a fluid — and nothing else that matters. When a buyer says "it's the same CVT, just the newer one", the fluid is usually what convinced them. Rule of thumb from our bench: if the stamp differs, treat the whole unit as a different gearbox and re-derive every parts line from scratch.
07What does interchange
An honest list, because it is short. What carries across the two units:
- The fluid specification. Nissan NS-3 for both. Not NS-2, not generic CVT fluid.
- The diagnostic approach. The same logic applies: read the code, decide hydraulic versus mechanical versus electrical, and look at the fluid before ordering anything. Our fault-code reference covers the code families this platform produces.
- The identification discipline. Read the code stamped on the housing, not the vehicle badge. That habit is what prevents both classes of wrong order.
- Nothing that wears. No belt, no pulley, no valve body, no solenoid, no pump crosses the line.
08Telling them apart in two minutes
| Check | JF015E | JF020E |
|---|---|---|
| Housing stamp code (fastest, no tools) | X42..., 3JX... — e.g. X427E, X428E, 3JX4E, 3JX6C | 50... — e.g. 50X1A, 50X5A |
| Vehicle generation | Earlier build of the same nameplate | Later build, or a nameplate introduced after the W/R arrived |
| Solenoid count in the valve body | As catalogued for the US and international numbers | Six — the definitive tell once the pan is off |
| Valve body number | 31705-X429B/C/D, 31705-3JX8A, 31705-3JX5D | 31705-50X0B |
The stamp code is the one to lead with. It is visible from under the bonnet, it does not require the transmission to come out, and it survives a previous valve body replacement — which the part number does not. Full number breakdowns are on the JF015E valve body OE number reference.
09Why the trade argues about RE0F11B and RE0F12A
You will see the wide-ratio unit filed under both names, and you will see them used as if they were synonyms. They are not a settled point in the aftermarket:
- Catalogues that group by JATCO platform file the six-solenoid valve body as belonging to RE0F11B / RE0F12A / JF020E — treating the two designations as one family for parts purposes.
- Industry technical descriptions of the CVT7 W/R name RE0F12A as its designation.
- JATCO's own platform line-up places the wide-ratio small CVT in the RE0F11B direction.
We do not invent a resolution to this, and we would be suspicious of any supplier who does. What matters commercially is narrower and completely unambiguous: the wide-ratio unit uses valve body 31705-50X0B and the JF015E does not. If your stamp starts with 50, you are in the wide-ratio family whatever the catalogue calls it — and the parts are the six-solenoid ones.
10What to send, and what comes back
One photograph of the housing stamp and one of the solenoid side of the valve body will separate these two units for certain. Add the VIN, the stored fault codes and the fluid condition and we can also tell you whether the valve body is the right starting point at all:
| Send us | Where it is | What it settles |
|---|---|---|
| Housing stamp code | Stamped or cast on the transmission case | Which of the two units is in the car — the whole question, in one photo. |
| Solenoid-side photograph | The valve body | Solenoid count and cap type. |
| VIN | Windscreen or door jamb | Build market and engine. |
| Stored fault codes | Any scanner with CVT live data | Hydraulic versus mechanical versus electrical. |
| Fluid condition | Drained sample | Whether belt or pulley debris is already circulating — which changes the answer. |
We confirm version, part number, stock and lead time in writing within four business hours. Minimum order is one piece. Every complete assembly is dyno-tested and every valve body flow- and pressure-tested on a computerised bench before dispatch.
JF015E figures are the documented values used across this site's JF015E reference cluster. JF020E / CVT7 W/R figures — ratio coverage 8.7, pulley span 0.458–2.200, auxiliary ratios 1 and 1.821, Guangzhou production, 156 Nm and 1.6L engine ceiling — are drawn from published JATCO-facing technical descriptions of the wide-ratio CVT7, including platform-level technical write-ups and independent transmission databases. The six-solenoid valve body grouping is cross-checked against aftermarket catalogue data. Where the aftermarket disagrees on the RE0F11B versus RE0F12A designation we state the disagreement rather than resolving it. Nothing here replaces the code stamped on your own transmission housing.
11Sources and frequently asked questions
Is the JF020E just a newer JF015E?
It is a development of the same concept rather than a revision of the same transmission. The architecture is shared — small push belt plus a two-speed auxiliary planetary gearbox — and the variator, belt, oil pump and valve body all differ. Ratio coverage goes from 7.3 to 8.7. Buyers who treat it as "the newer version of the same part" are the ones who order wrong.
Will a JF015E valve body fit a JF020E?
No. The wide-ratio unit uses the six-solenoid valve body 31705-50X0B. No JF015E valve body number crosses to it, and the calibration differs as well. If a listing bundles both, the listing is wrong.
Do they use the same fluid?
Yes — Nissan CVT fluid NS-3 for both. NS-2 and generic CVT fluids are not substitutes for either unit. This shared specification is the main reason buyers assume more parts are shared than actually are.
How can I tell which one my car has without removing the transmission?
Read the stamp code on the transmission housing. Codes beginning with 50 belong to the wide-ratio unit; X42 and 3JX codes belong to the JF015E. That single check is faster and more reliable than any vehicle-year table, and it survives a previous valve body replacement.
My Kicks has a "JF015E" per an online listing. Is that right?
The Kicks 1.6L from 2018–2019 is documented as the wide-ratio unit — the JF020E group, with housing stamps like 50X1A and 50X5A. Listings that return JF015E for it are grouping by vehicle badge rather than by transmission. Check the stamp before ordering anything.
Which unit has more ratio spread — and does it matter for parts?
The JF020E, at 8.7 against 7.3. For parts it matters a great deal, because the extra spread comes from the variator: belt and pulley system. It has no bearing on which unit is "better" for a given repair, only on which parts belong in the car.
Is the JF020E produced outside China?
Published technical descriptions place wide-ratio CVT7 production at JATCO's Guangzhou plant, developed for the Chinese market. The JF015E was built across several JATCO plants worldwide, which is consistent with its much wider international service footprint today.
What do you need from me to confirm which unit I have?
A photograph of the housing stamp code, a photograph of the solenoid side of the valve body, the VIN, the stored fault codes and the fluid condition. We confirm version, part number, stock and lead time in writing within four business hours. Minimum order is one piece.