Today, it is the world's leading manufacturer of CVTs for automobiles — the company manufactures almost half of such transmissions worldwide. The Jatco JFE model is designed for up to Nm torque transfer and intended for compact passenger cars with the 1.
In the Russian market, it is common in the gasoline-powered Qashqai and Juke. Nissan's employees often call JFE "small" to distinguish it from the "big" JFE, which is able to transmit torque of up to Nm and be installed on the more powerful Qashqai models.
JF015E CVT Nissan
This transmission also has a torque converter and a compound epicyclic reduction gear. Such a complex design solution is necessary to reduce the gearbox size and simultaneously increase the gear ratio.
If this ratio is expanded with the employment of CVT only, it will grow in size. This allowed making both CVT and the whole gearbox smaller in size. Torque converter became thinner, too.
As a result, this transmission is 10 percent shorter and 13 percent lighter than the JFE. Therefore, Nissan, Suzuki and Mitsubishi were able to employ it in compact front-wheel drive models.
CVT is based on push belt and tapered pulleys that transmit torque, with transmission gear ratio changing due to the approach and expansion of pulleys. A major difference of the JFE from the JFE is that the compound epicyclic reduction gear has two stages to move forward. They switch automatically, the driver is not involved in the switching process. Epicyclic gearbox is controlled by friction clutch and a brake that serves to activate reverse gear.
The possibility of activating reverse gear without changing the direction of CVT pulleys rotation is to increase its service life due to lower loads in case of frequent switchings, for example, in constrained parking, when the car moves back and forth for a while. More complex design as compared with other CVT transmissions has not reduced the reliability of the JFE versus other solutions — both torque converter and reduction gear create no special problems. At least not more than any other torque converters and epicyclic gearboxes.
Yet the JFE has its typical "diseases," too. A common complaint of the car owner is irregular motion, kicks at acceleration. There may be several reasons behind this kind behavior of a car. However, virtually all of them have to do with oil contamination with the pulley debris — metal chips or filings can create a variety of problems. There are magnets in the crankcase to mitigate harmful effects of these metal particles, they have to collect these particles but sometimes do not cope with the task.
This may cause various malfunctions. First of all, accelerated wear of the valve body leading to pressure fluctuations, which, in turn, make pulleys move, resulting in the fluctuations of transmission gear ratio and irregular motion of the car. The valve body needs to be repaired and possibly even replaced.
This type of defect can occur fairly soon, in cars with not more than 30—40 thousand km on the odometer. Unless the valve body is repaired or replaced in time, this will ultimately cause damage to pulleys and belt that will have to be replaced in this case.
Pulleys are the most expensive unit of the CVT. They can be polished but in some cases only replacement can help. Metal contaminants also block up pressure controllers, thus contributing to an accelerated wear of valves. Timely oil change and a mandatory installation of new filters can help avoid these problems. Wear and, accordingly, oil contamination get stronger if the driver starts off when the engine is cold.
Pulleys and push belt wear off quickly at slip at this very moment filings and chips occur. Modern engines do not need to be run in, although they do not like abrupt loads in cold, but it is very bad for transmission. It is recommended that the driver move smoothly during the first few minutes.Aisin Warner See all Back. Borg Warner See all Back. Citroen See all Back. Daewoo See all Back. Delorean See all Back. Dodge See all Back. Eagle See all Back. Ferrari See all Back. Fiat See all Back. Ford See all Back.
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Input shaft Bearing JF015E CVT Automatic Transmission Parts Bearing for Input shaft JF015
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This construction may be regarded as a mixture of CVT and 2-speed transmission, that allows reducing cones by exceeding the gear ratio by means of two forward gears. Common problems of the JF unit are similar to issues of its predecessor JF In most cases, problems occur after significant mileage and may be characterized as "spare parts wear-out".
The most urgent repair procedure for CVTs is the replacement of teflon rings, which are replaced together with the input shaft repair and replacement of frictions, replacement of bearings, or change of the belt caused by the exploitation with worn-out rings which rapidly decreases the resource of all these parts.
A common issue of JF is the input shaft bearing failure. The main shaft is considered to be a soft spot leading to the abovementioned problem. This transmission is sensitive to contaminated and cold ATF. Well-timed replacement of the belt having still operating protector helps to prolong the resource of cones, which are considered to be the most important and high-priced unit of the CVT design.
Another frequently replaced component of JFE is the damaged sun gear. The wear-out of solenoids occurs because of ATF contamination caused by the wear-out of rings and seals, forcing the pump to transmit increased ATF volume in order to make up for shortage of pressure on clutches. Therefore, solenoids are replaced together with all gaskets and rings. The issue of input and output shaft bearings is expected to occur when driving with a slipping belt.
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Excess wear of the pump flow control valve allows crucial pressure loss that can lead to these symptoms. In addition, lube failures and overheat symptoms can arise.
Reconditioning the bore and installing Sonnax oversized torque converter pressure regulator valve kit K clears up these troubles for renewed TCC control. Categories Toggle Navigation. Find Parts.
Downloads JFE Login to order. Oil Change kit JF Toolkit Pulley JF Transgo. Pump flow v. Correction: Ream the bore to restore circularity and size the diameter to establish functional clearances between the reamed bore and oversize valve.
Seal Axle conv. Wire harness JF 1 press. Wire harness JF 2 press. Output sensor JF Input sensor JFYour question may be answered by sellers, manufacturers, or customers who purchased this item, who are all part of the Amazon community.
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