Gear whine, bearing noise and clunking are common rear differential noises that should be a concern to vehicle owners. If, for example, lubrication runs low on the mechanism or the arrangement of the gears goes out of place, rear differential noise occurs. The effectiveness of its function is dependent on how precise these gears are arranged and oriented relative to each other. The rear differential is made up of many gears with teeth entwined with each other. When this occurs it’s best to check the condition of your differential and replace if it’s in a rough condition. Usually the humming gets louder under acceleration. Gear Grinding Hearing an increase in the level of humming noises or gear grinding is a way of knowing almost for sure that you have a worn out differential.This lack of lubrication can appear thanks to leaking fluids for example and will inevitably lead to whining noises when that happens. Whining Noises These are the most common and appear due to lack of lubrication over internal components of the differential.These are early warning signs that the differential needs checking as soon as possible. This vibration can be felt more accentuated when you accelerate your vehicle and can lead to even stronger vibrations if differential fluid leak appears. Vibrations Significant wear and tear done to the universal joints of your differential lead to vibration in the drive shaft.Tire damage As you take corners the wheels and tires traveling at the same speed will lead to a premature wear of the inner tires or even damage because the speed will be significantly higher than what the inner threads were designed to sustain.It would be advisable to get your car to a mechanic as soon as you sense an issue with handling. The wheels will no be able to readjust their speeds making the handling of your vehicle quite unpredictable and can lead to an accident. Difficulty in handling As the differential is the element which helps handle your vehicle in a turn, once it starts to wear out, precision is not something that will be on your side anymore.If for example you have a rear gear ratio of 3.73:1, this simply means that the drive shaft (which is connected directly to the pinion gear) is going to rotate 3.73 times to the wheels turning one, full rotation. This is often referred to ring and pinion ratio. To put it simply, this mechanism is the one that decides the speed and the frequency of the turning of the axle and wheels in relation to the turning of the drive shaft. This is made possible with the help of the rear differential’s side gears and spiders. In situations like this, the wheel on the turning side (inside wheel) rotates slower than its counterpart (outside wheel). The pair of driving wheels in a vehicle does not rotate at the same speed during a turn. This very purpose is the reason behind the name ‘differential’-because it can distribute different kinds of speeds to wheels especially during a turn. This part serves to transmit engine power to the wheels while also enabling them to have different rotation speeds. The differential is the final end mechanism that enables the creation of torque in the crankshaft before it is distributed through the transmission, to the drive shaft, and then to the wheels. “ What is the Purpose of a Rear Differential? But how exactly does the motion of the piston or crankshaft convert to the rotational motion of the wheels? Let’s take a look at the magic of the rear differential and the problems that arise from rear differential noise. We all know that a vehicle works via its engine’s piston motion which is powered by fuel combustion. “The rear differential plays a very large role in the working assembly of a car, truck or semi.
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