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Home >> Mazda >> 1984 >> B2000 Base, Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Diagnosis & Overhaul - JATCO 3N71B, E4N71B, JM600, L3N71B & L4N71B >> Trouble Shooting >> Symptom Diagnosis >> Torque Converter Does Not Lock Up

Torque Converter Does Not Lock Up

NOTE: Following problems and possible causes apply ONLY to models with lock-up control and overdrive functions. These are E4N71B, JM600, L3N71B and L4N71B transmission models.

Governor tube disconnected or damaged. Governor faulty. Incorrect line pressure. Check "O" ring in input shaft and oil pump condition. Speed cut valve defective. Lock-up control valve, solenoid, control unit or sensors defective. Check lock-up orifice in oil pump cover. Faulty torque converter.

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