TM10-3930-660-20 Table  2-3. Mechanical Troubleshooting (Cont’d) MALFUNCTION TEST OR INSPECTION CORRECTIVE  ACTION Step 2. Check  for  high  transmission  oil  temperature,  above  250°F. Refer to Test 26, High Transmission Oil Temperature, in this table. Step 3. Check for foaming transmission oil. Refer to Test 29, Loss of Power, in this table. 28. LOW ENGINE SPEED AT TORQUE CONVERTER STALL Step 1. Check for low engine output torque. Check engine for proper output torque and tune engine if necessary. Refer to Direct Support Maintenance. Step 2. Check for transmission not up to operating temperature. Check that transmission temperature is between 180 to 210°F. 29. LOSS OF POWER Step 1. Check for low engine speed at torque converter stall. Refer to Test 28, Low Engine Speed at Torque Converter Stall, in this table. Step 2. Check for high engine speed at torque converter stall. Refer to Test 27, High Engine Speed at Torque Converter Stall, in this table. Step 3. Check  for  transmission  control  valve  not  positioned  properly. Replace control valve linkage, para. 9-4. Step 4. Check for vehicle brakes dragging. Inspect parking and service brakes for dragging. Repair brakes if necessary. Refer to Tests 36-40 in this table. Step 5. Check for foaming oil. a. Check for low transmission oil level; add oil as necessary, LO10-3930-660-12. b. Check for water in transmission oil (see LO10-3930-660-12). If found, find and repair leak. Drain and fill system, para. 9-7. 2-41