78. Extraneous noises
1. Normal road noise - cannot be corrected.
2. Tire noise - check the condition of the treads and tire inflation pressure.
3. Wheel bearings are worn or damaged, or their tightening force has weakened.
4. Transfer case input shaft bearings are worn or damaged.
5. The bearings of the rear output shaft of the transfer case are worn or damaged.
6. The lubricant level in the transfer case has dropped.
79. Vibrations
1. Check the condition of the wheel bearings by alternately jacking up the appropriate corners of the car and rotating the wheel manually. Listen to the sounds coming from the bearing. Remove the bearings and check their condition.
80. Oil leaks
1. The gearbox seals are damaged.
The full version is posted on the resource audimanual