JR400E
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JATCO JR400E – 4-speed hydromechanical automatic transmission belonging to the Japanese manufacturer JATCO's group of longitudinally mounted transmissions. It is used in certain light commercial vehicle and pickup models with rear-wheel drive (RWD) or four-wheel drive (4WD).
The transmission's operation is based on a hydrodynamic torque converter, planetary gear sets, multi-plate clutches and a hydraulic gear shift system. The four-speed design makes it possible to combine torque transfer when driving at lower speeds with more economical operation in a higher gear. The JR400E is identified in professional transmission application catalogues, but its exact design variant must be determined from the unit's identification data.
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Designations:
- JATCO / transmission catalogues: JR400E, JR400-E.
- Related transmissions: JR401E, 4N71B, L4N71B, E4N71B, N4A-EL, N4A-HL – designations of related designs or transmission groups, but not confirmed as direct synonyms of the JR400E.
Vehicle model examples (certain variants only, depending on production year, engine and market):
- Ford: Ranger (approx. 2000–2006, 2.5 l engine, certain RWD and 4WD automatic versions).
- Mazda: Fighter / B-Series (approx. 2000–2008, 2.5 l engine, certain RWD and 4WD automatic versions).
Important: The JR400E must not be automatically equated with the JR401E, JR402E, 4N71B or other JATCO four-speed transmissions. The hydraulic valve bodies, clutches, solenoids, torque converters, housings and other components of different units and their variants may be incompatible. Before ordering spare parts, be sure to check the vehicle's VIN, exact transmission code and original OE number.