• Burning Smell from the Differential. When you notice a bad smell coming from your gearbox, you should take it as a sign of bad differential oil which can be contaminated hence not operating as it should be. ...
• Weird Noises. ...
• Vibrations.

What happens if your low on differential fluid?

Worn gears and low differential fluid will result in a grinding or humming noise coming from the differential. Any strange noises should be checked out by a professional technician to ensure the problem is properly taken care of.

How do you know if you have a bad differential?

One of the most obvious signs is a loud whirring noise that takes place when your vehicle is decelerating. You also may hear a howl or a whine when you are accelerating. This can be symptomatic of a bad differential.

How long can you go without changing the differential fluid?

Because the differential is at the rear and under the car, it gets none of the star treatment that the engine up front does. But if lubrication in the car differential fails, you won't be getting very far for very long. Fortunately, you only need to change this oil every 30,000 to 50,000 miles.

What happens if you don't change rear differential fluid?

If this fluid isn't changed in the manufacturer-prescribed intervals, then it can get dirty and thick, which could damage the differential over time.

This Is What Happens If You NEVER CHECK YOUR DIFFERENTIAL OIL!!

How much does it cost to fix a rear differential?

Combined with the few hours of labor required for their replacement, the typical rear differential cost of repair is between $200 and $400. If gears are required, that number jumps a bunch. Rear differential repairs that include a new gear set may be $1,500 or even higher between parts and the labor to replace them.

How often should I change diff fluid?

Usually, differential fluid is changed after every 30k to 60k miles driven. This is a tough job, so must be handled by an expert technician. Only an experienced mechanic can properly wipe out the old different fluid from your vehicle's drive-train.

Can a bad rear differential cause transmission problems?

When the differential doesn't perform well, it creates metal-on-metal friction that wears down surfaces. The resulting heat weakens gears and can cause component failure and transmission problems.

What does a bad rear end sound like?

In the case of a rear end, the noise can be a humming sound, a growl, or even a knock. Although any noise is bad, the noise does help in diagnosis. ... Ring and pinion gear-noise changes with vehicle speed and is usually unaffected by loads and turns.

What does differential fluid smell like?

Sulfur compounds used in extreme pressure lubricants smell either like rotten eggs or worse depending on additive concentration. A good call is to wear clothes you can throw away and not get any gear oil anywhere you don't want to smell it for a while. This applies in particular to the interior of the vehicle.

Does the differential affect the transmission?

The differential has one primary function: to provide the right amount of power to your tires so your vehicle can move at varying speeds. The differential ensures the right amount of speed is transmitted to your tires via the engine and transmission and allows your wheels to rotate as acceleration and power changes.

What happens when a rear differential locks up?

The differential is designed to allow the wheels to turn at different speeds around corners, eliminating that problem. ... If that happens, the gears can seize, locking up the rear wheels and potentially causing a lot of damage or even an accident.

What are the signs of a bad drive shaft?

• Vibrations from under the vehicle. A common symptom of a failing driveshaft is an intense shaking coming from underneath the vehicle. ...
• Difficulty turning. ...
• Loud clunking noise. ...
• Car shudders upon acceleration. ...
• Squeaking noise. ...
• Clicking or knocking noise.

Is it hard to rebuild a differential?

A complete rear differential replacement includes replacing the housing, gears, bearings, and seals. The average time it takes a certified mechanic to perform a differential rebuild at a shop is usually three to five hours. A rebuild on a commercial vehicle by someone without prior experience could take much longer.

What should differential fluid look like?

What Does Differential Fluid Look Like? Differential fluid looks like engine oil but is thicker. There are two types of differential fluid. One is mineral oil, which is a natural, crude oil-based fluid.

What does rear differential fluid do?

Every front or rear axle is filled with a special oil (also called differential fluid, or gear oil) that takes care of this. The differential fluid lubricates the gears, bearings and other internal parts, and provides cooling to these components as well.

Do aluminum differential covers work?

The first being the material itself: aluminum covers will expend heat very well. Aluminum also has a weight advantage. Compared to steel or iron ones, diff covers made of aluminum are also significantly lighter. A second way that a cover can help keep things cool is by design.

What is a rear diff lock?

A locking rear differential, once engaged, does not allow both wheels to spin freely. By ensuring that both wheels spin at the same rate, and applying unequal torque to each tire on the axle, the risk of losing traction or spinning out decreases dramatically.

Does Jiffy Lube do differential service?

The Jiffy Lube® Differential Service replaces the old, depleted fluid with new, manufacturer-recommended fluid that provides better protection for this important mechanical system. ... The differential is located between the two wheels, and is attached to each wheel by an axle shaft.

Is it necessary to change rear differential fluid?

Most car manufacturers recommend that you perform a differential fluid change every 30,000 to 60,000 miles. Like many of the car's oil, fluid, and parts, the differential fluid also gets contaminated over time and breaks down because of heat. If it is left too long and neglected, the fluid may start to run low.

Can you lock and unlock your differential?

Selectable lockers allow the driver to lock and unlock the differential at will from the driver's seat. This can be accomplished in many ways. Compressed air (pneumatics). Cable-operated mechanism as is employed on the "Ox Locker".

Whats a diff lock do?

By engaging the diff-lock, whether it be factory standard or fitted after-market, the diff is “locked” and begins to drive both wheels evenly. This allows not only the wheel without traction to continue to spin in the hope of gaining traction, but more importantly, begins to drive the well-grounded wheel.