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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 >> No 4-3 Shift

No 4-3 Shift

Check vacuum diaphragm and lines. Faulty control valve or governor. Faulty direct or front clutch. Faulty overdrive band brake. Faulty oil pump.