TM 9-2320-361-20 Table 2-2. Mechanical Troubleshooting (Contd). MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 29. TRANSFER CASE DIFFICULT TO SHIFT Step 1. Step 2. Step 3. Check transfer case fluid level (LO 9-2320-209-12-1). Fill or drain to proper level (LO 9-2320-209-12-1). Inspect shift linkage for bends, breaks, or missing parts. Replace any broken, bent, or missing parts (para. 6-2 or 6-3). If internal problems in transfer case exist, notify your supervisor. END OF TESTING! 30. TRANSFER CASE GRINDS OR POPS OUT OF GEAR DURING NORMAL VEHICLE OPERATION Step 1. Check condition and adjustment of external transfer case linkages. If linkages are damaged, repair, replace, or adjust (para. 6-2 or 6-3). Step 2. If internal problems in transfer case exist, notify your supervisor. END OF TESTING! 31. TRANSFER CASE NOISY Step 1. Check transfer case fluid level (LO 9-2320-209-12-1). If low, fill to proper level (LO 9-2320-209-12-1). Step 2. Drain transfer case fluid (LO 9-2320-209-12-1) and check for signs of broken gears, metal shavings and contamination. If broken gears, metal shavings, or contamination are found in transfer case or on magnetic drainplug, notify your supervisor. END OF TESTING! PROPELLER SHAFTS 32. PROPELLER SHAFT VIBRATION Step 1. Step 2. Step 3. Inspect propeller shaft for foreign material or damage. Clean foreign material from propeller shaft, or replace if damaged (para. 7-2). Inspect propeller shaft for loose screws. If any screws are loose, tighten. Check universal joints for play or looseness. If rust is visible around U-joint, disassemble and inspect. Replace U-joint, disassemble and inspect. Replace U-joint if damaged (para. 7-4). END OF TESTING! DIFFERENTIALS 33. DIFFERENTIAL NOISY Step 1. Step 2. Step 3. Check to see if front wheel drive is engaged. Disengage front wheel drive when traveling on hard flat surfaces. Check lubrication level in axle housing differential (LO 9-2320-209-12-1). If low, fill to proper oil level (LO 9-2320-209-12-1). Check for loose inner wheel adapter nuts or loose lugnuts. a. If inner wheel adapter nuts are loose, tighten 400-425 lb-ft (542-576 N·m). b. If lugnuts are loose, tighten 325-355 lb-ft (441-481 N·m). 2-37