Noise Acceptability
Noise AcceptabilityA gear-driven unit will produce a certain amount of noise. Some noise is acceptable and audible at certain speeds or under various driving conditions such as a newly paved blacktop road. Slight noise is not detrimental to the operation of the axle and is considered normal.
Flex Coupling Inspection
Check for visible reinforcing cords and signs of tearing, cracking or wear. If the flex couplings show signs of damage, inspect the rear axle mounts for cracking and tearing.