Ring and pinion gears must be adjusted to mate together within very close tolerances. Otherwise problems arise that include noise, premature wear and vibration. As the gears wear naturally, various symptoms may appear. These symptoms may only appear during certain driving conditions, described as follows:
The condition wherein the engine is gradually increasing power and the car is accelerating slowly.
The car's speed is held at a specific level, with neither added engine power nor deceleration.
The car's engine is being driven by the mass of the car as it slows down. Maximum engine braking occurs during this phase.
This is the condition wherein the car gradually slows down, but the engine is producing just enough power to prevent the car itself from dragging (engine braking).
Noise During Acceleration
This noise is almost always due to a too-close heel contact on the ring gear.
This noise is due to too-close toe contact on the ring gear.
Noise During All Conditions
Noise When Turning Curves
This occurs when the differential gears are worn or damaged through misuse.
Backlash In Drive Line