Overhaul - JATCO E4N71B, L4N71B & JM600, & MAZDA N4A-El & N4A-Hl: Description
L4N71 B, E4N71 B, N4A-HL, N4A-EL and JM600 may vary in components from vehicle to vehicle. All are 4-speed overdrive units, controlled either hydraulically or electrically. These units have 3 element lock-up torque converters and 3 planetary gear sets. The E4N71 B and N4A-EL uses a microcomputer to select shift patterns (standard or power), depending upon accelerator position. Shift pattern programs are set in lock-up control unit according to vehicle speed and throttle position. See Fig 1 and Fig 2 .