Transfer Case Popping Noise
| Cause | Correction |
|---|
| DEFINITION: A faulty internal transfer case component that causes a popping noise in the transfer case. Review the Symptoms - Transfer Case and perform the necessary inspections. |
| Chain jump | Replace the chain and sprockets. Refer to Transfer Case Disassemble and Transfer Case Assemble . Replace the shaft bearings. Refer to Transfer Case Disassemble and Transfer Case Assemble . Inspect for damaged components caused by metal debris. Refer to Transfer Case Disassemble and Transfer Case Assemble . |
Transfer Case Whine or Rumble Noise
| Cause | Correction |
|---|
| DEFINITION: A faulty internal transfer case component that causes a whine noise in the transfer case. Review the Symptoms - Transfer Case and perform the necessary inspections. |
| Faulty bearings | Inspect all of the bearings and journals. Refer to Transfer Case Cleaning and Inspection . Replace any faulty bearings, and any components with faulty bearing journals. Refer to Transfer Case Disassemble and Transfer Case Assemble . |
| Worn or loose chain | Inspect for a loose chain, excessive wear on the snubber or deep gouges in the lining. Replace the chain, sprockets and snubber. Refer to Transfer Case Disassemble and Transfer Case Assemble . |
Transfer Case Growl or Grinding Noise
| Cause | Correction |
|---|
| DEFINITION: A faulty internal transfer case component that causes a growl or grinding noise in the transfer case while the vehicle is turning. Review the Symptoms - Transfer Case and perform the necessary inspections. |
| Planetary differential | Inspect the planetary differential pinion gears for the following conditions: Chipped, bent or deformed teeth Pinion gear bushings worn Pinion gear thrust washers missing Seized or binding pinion gears Refer to Transfer Case Cleaning and Inspection . Inspect the planetary differential for deformation. Refer to Transfer Case Cleaning and Inspection . Replace the planetary differential assembly if faulty. Refer to Transfer Case Disassemble and Transfer Case Assemble . |
| Sun gears | Inspect the sun gears for the following conditions: Gear tooth failure Worn or galled thrust surfaces Refer to Transfer Case Cleaning and Inspection . Replace the sun gears if faulty. Refer to Transfer Case Disassemble and Transfer Case Assemble . |
| Thrust washer | Inspect the thrust washer for seizure to the planetary differential. Inspect the thrust washer for galling. Replace the thrust washer if faulty and the mating component if damaged. Refer to Transfer Case Disassemble and Transfer Case Assemble . |
| Planetary differential not timed properly | Inspect the planetary differential for being timed properly. Refer to Transfer Case Assemble . Properly time the planetary differential gears. Refer to Transfer Case Assemble . |
Transfer Case Clunk During Acceleration and Deceleration
| Cause | Correction |
|---|
| DEFINITION: During acceleration or deceleration, a clunk is heard or felt in the transfer case. Review the Symptoms - Transfer Case and perform the necessary inspections. |
| Incorrect fluid level or incorrect fluid | Inspect the transfer case for the correct fluid level. Refer to Transfer Case Fluid Replacement . Inspect the transfer case for the correct type of fluid. Flush the transfer case, and fill with the correct fluid, if required. Refer to Approximate Fluid Capacities . |
| Worn or faulty planetary differential | Inspect the planetary differential for the following conditions: Loose planetary differential splines to the input shaft splines Loose or faulty pinion gears Refer to Transfer Case Cleaning and Inspection . Replace the planetary differential assembly if faulty. Refer to Transfer Case Disassemble and Transfer Case Assemble . |
| Worn or missing sun gear thrust washer | Inspect to ensure the thrust washer is installed. Inspect the thrust washer and mating surface for excessive wear. Replace the worn or missing thrust washer. Refer to Transfer Case Disassemble and Transfer Case Assemble . |
| Worn or damaged rear sun gear | Inspect the sun gear external gear teeth for excessive wear. Inspect the sun gear-to-rear output shaft for excessive looseness. Replace the sun gear or rear output shaft if worn. Refer to Transfer Case Disassemble and Transfer Case Assemble . |
| Rear output shaft bearing outer retaining ring | Inspect for the following conditions: Proper installation of the rear output shaft bearing retaining ring Excessive wear or damaged retaining ring groove in the rear case half Repair or replace the following components if found faulty: Properly install a new rear output shaft bearing outer retaining ring. Replace the rear case half if the retaining ring groove is excessively worn. Refer to Transfer Case Disassemble and Transfer Case Assemble . |
| Worn or loose chain | Inspect for a loose chain, excessive wear on the snubber or deep gouges in the lining. Replace the chain, sprockets and snubber. Refer to Transfer Case Disassemble and Transfer Case Assemble . |
