LOSS OF TCC AT ROAD SPEED ENG. TEMP. COOL BELOW 82 DEG.C

MODELS AFFECTED: 1984 CENTURYS EQUIPPED WITH 3.0L (VIN CODE E) ENGINES AND 1226519 ECM

Some 1984 3.0L Centurys may exhibit loss of Torque Converter Clutch at road load speeds. The cause for loss of Torque Converter Clutch (TCC) is engine temperatures are cooling off to below 82 DEG C (celsius) during cold weather operation. When temperatures go below 82 DEG C (celsius) the PROM program inhibits torque convertor clutch.

To correct, install a new service PROM part number 1226999 as per the 1984 Chassis Service Manual. This PROM lowers the minimum engine temperature required for TCC operation.

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