TM  10-3930-638-24&P 2-37.  AXLES  AND  DRIVE  SHAFT  ASSEMBLIES  TROUBLESHOOTING  (cont) MALFUNCTION TEST  OR  INSPECTION CORRECTIVE  ACTION 2. CONTINUOUS AXLE OR WHEEL NOISE (cont) Step 2. (cont) a. If end play is noticeable, adjust or replace wheel bearing (para 2-39f). b. If end play is okay, proceed to step 3. Step  3.  Check  axle  shafts  for  damage  (para  2-39f). a. If axle shafts damaged, replace (para 2-39f). b. If axle shafts are not damaged, notify direct support maintenance. 3. DIFFERENTIAL CARRIER ASSEMBLY OVERHEATING Check lubricant level (para 2-39d). Add lubricant (para 2-39d) 4. LUBRICANT LEAKING FROM DIFFERENTIAL CARRIER ASSEMBLY Check axle breather for damage or clogged condition (para 2-39e). a. If axle breather is damaged or clogged. clean or replace it (para 2-39e). b. If axle breather is okay, notify direct support maintenance. 5.  EXCESSIVE  NOISE  OR  VIBRATION  IN  DRIVE  SHAFT  ASSEMBLIES Step 1. Check for loose universal joint mounting bolts (para 2-39a, b and c). a. If universal joint mounting bolts are loose, tighten (para 2-39a, b and c). b. If universal joint mounting bolts are tight, proceed to step 2. Step 2. Check drive shaft assemblies for insufficient lubrication, wear or damage (indicated by excessive movement  between  universal  joint  and  drive  shaft  assembly  in  any  direction). a. If drive shaft assemblies are insufficiently lubricated, lubricate (para 2-39a, b and c); if worn or damaged, repair or replace drive shaft assembly (para 2-39a, b and c). b. If drive shaft assemblies are lubricated and are not worn or damaged, check for a bent drive shaft assembly (para 2-39a, b and c). Replace a bent drive shaft assembly (para 2-39a, b and c). 2-200