KNOWN INFO                     POSSIBLE PROBLEMS        2. Is engine oil cooler free from external leaks or damage?            TEST OPTIONS                REASON FOR QUESTION                 KNOWN INFO                     POSSIBLE PROBLEMS        3. Is transmission oil cooler free from external leaks or damage? WARNING Read WARNING on following page.            TEST OPTIONS                REASON FOR QUESTION     YES Notify DS Maintenance. YES Replace transmission oil cooler (para 8-10). d3. LOSS OF COOLANT (CONT)   NO NO Radiator OK. Radiator overflow tank OK. Air coolant hoses and tubes OK. Leaking or damaged engine oil cooler will cause a loss of coolant. Leaking or damaged transmission oil cooler will cause a loss of coolant. Visual Inspection Visual Inspection Radiator OK. Radiator overflow tank OK. All coolant hoses and tubes OK. Engine oil cooler free from external leaks or damage. External leaks or damage to engine oil cooler. External leaks or damage to transmission oil cooler. Faulty water pump. Faulty transmission oil cooler. TM 9-2320-365-20-1 2-144.2          Change 1 External leaks or damage to transmission oil cooler. Faulty water pump. Faulty transmission oil cooler.