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Home >> GMC >> 1990 >> Forward Control 3.9 L >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Diagnosis - Torque Converter Clutch >> Trouble Shooting >> Notes

Trouble Shooting: Notes

NOTE: Every diagnosis of automatic transmission problems should begin with a check of the transmission fluid and linkage. Most of the following conditions can be caused by one or more of the following factors: (1) Incorrect fluid level, (2) Contaminated fluid, (3) Improperly adjusted linkage, or (4) Damaged or worn linkage. When diagnosing Converter Clutch problems, ensure engine and vacuum systems are in perfect operating order.