Jatco JF414E

Transmission general data

The 4-speed automatic transmission JF414 of the class “mini” with an east-west mounting for FWD cars was designed by the Japanese company Jatco for vehicles with the engine capacity of up to 1.6 liters. AvtoVaz used JF414 for Lada "Granta".

Technical issues and repair guidelines

Besides Lada Granta, this CVT transmission was also installed on Nissan Almera and March models with up to 1.6 liters. Moreover, this solution may be used on Ad Van. This CVT was developed as a budgetary and reliable option for "long-running" cars. The main competitor of this CVT is AW60-40 by Aisin.The design of JF414E components is maximally simplified according to the principle "nothing in excess"

Repair procedures and typical problems

Rebuilding procedures of this transmission are related to the replacement of spare parts (namely, gaskets, seals and friction elements).Usually repair specialists have to replace worn-out friction elements. Bearings also may be replaced in the course of the overhaul. The most common bearing to be replaced is a double-row center bearing. This bearing is damaged by overloads and driving with vibrations at high speeds.The valve body of the JF414 unit is quite reliable and rarely gets replaced.

The main spare parts of the valve body are gaskets and solenoids. The transmission exploitation with contaminated fluid, worn-out torque converter clutch, and especially overheating may shorten the service life of solenoids and valve body gaskets by several times. The list of vulnerabilities of Jatco valve bodies includes sensors and a circuit board located in the valve body. Also these valve bodies are very sensitive to contaminated and hot fluid with metal chips.Computer settings are well-adjusted for packages and the torque converter lockup, which turns on at the very end of the 3-rd and 4-th gear, allowing the friction to have quite a long service life.