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Symptoms of a Bad or Failing Support Bearing
Common signs include unusual noises and shuddering during acceleration.
Symptoms of a Bad or Failing Differential Output Seal
Common signs include whining sounds and oil leaks coming from the differential.
Symptoms of a Bad or Failing Axle Shaft Seal
If there are signs of leakage, puddle of fluid, or the axle shaft pops out, you may need to replace your car's axle shaft seal.
Symptoms of a Bad or Failing Pinion Seal
Common signs include a leaking pinion seal, low fluid in the differential, and a whining noise while the vehicle is in motion.
How Does Traction Control Work?
It’s raining as you drive on a darkened highway late at night, but you never worry about safety. Your car has traction control. While you know the term, you may not understand what it...
How to Check Your Car’s Differential Fluid
Ever since you got your driver’s license, you’ve been to told to check your engine oil. But what about the fluids underneath your vehicle? If you’ve got a rear-wheel...
How Often Do I Need to Replace My Car's Differential Fluid?
Many folks do not even know what the differential does. It is not one of those common car parts like the transmission or radiator. In fact, some people go the entire lifetime of a...
How Often Does My Car Need New Transfer Case Fluid?
A transfer case is a part of a drivetrain system. Its primary function is to engage the axles of multi-axle vehicles. Positioned underneath the vehicle, a transfer case is made of an aluminum or...
How to Replace a Pinion Seal
A pinion seal keeps oil in the differential and keeps water, dirt, and debris out. A failing pinion seal will leak which can ruin the differential.
What is Rear-Wheel Drive?
For the better part of the twentieth century, nearly every vehicle on the road had the engine sending power to the rear wheels. This arrangement makes a lot of sense to designers, with the...
How to Buy Good Quality Differential/Gear Oil
Gear, or differential, oil is used to lubricate the gears in a car’s transmission so that it can shift smoothly and easily. This type of fluid is generally used on standard transmissions,...

Related questions

Will my transmission be ok after driving without differential oil?
Anytime you run a component without the proper lubrication, you run the risk of damaging the component. Once you install the correct amount of lubricant and drive it, you will find out in short order if running it without lube...
what is the capacity of the differential and capacity of the transmission. fluids?
Hello, thanks for writing in about your Nissan Altima. The transaxle takes 7.88 quarts of Nissan CVT fluid NS-3 only. If you need assistance with having your transmission and differential fluid, consider YourMechanic, as one of our mobile technicians can...
Rear differential
Firstly, you will need equipment to safely raise and suspend the vehicle while working under it. A transmission jack or similar to support the exhaust (original system is 1-piece front-to-back) and the differential itself for removal and re-installation. Torx bolt...
Rear differential temp light on - 2006 Subaru B9 Tribeca
Despite the connector appearing OK, this is an indication of 0 (zero) resistance or a short in this circuit. It's possible the temperature sensor on the differential is itself shorted, or there is a short elsewhere in this circuit. This...
Whining when accelerating and slight grinding when letting off the gas.
Hi, thanks for writing in. I don't wish to 2nd-guess, but your symptom description suggests that either the differential or the transmission may have been run low on fluid, but was refilled after a couple of weeks? Not clear on...
Differential leak while speeding
Hey there, thanks for writing in about your 2009 Pontiac Solstice. The first thing to try is to see if there are sealing washers on the plugs of the differential. If the washers have mushroomed or are worn, some fluid...
Rear differential problem?
In my experience, I have never observed the differential to be the cause of vibration. The most likely culprits are the wheel or tire, driveshaft, or axle. You had the wheels balanced, so that will rule out balance or a...
The left wheel on the rear end lock up
Hello there. This is not uncommon on the Chevy K2500. There are a few possible causes for the wheel to get locked. The most likely would be low differential fluid, differential side gears, a ring and pinion failure, or a...
What is the difference between a pinion seal and a pinion flange?
Hello there, thanks for your question. The pinion flange is a part of the rear differential housing that the driveshaft bolts to. The other end is attached to the pinion gear inside of the differential. The pinion seal is what...
Differential fill plug can't be removed - 1984 Chevrolet K20
Hi there, thanks for your question. A few different differentials were offered in trucks like yours, so I'm not sure which one you have. In some cases, there are aftermarket differential covers available that include a fill plug. If not,...
Whats the best and cheapest way to relace a broken spider gear in the rear end?
Hello, thanks for writing in about your GMC Yukon. You would first have to determine what caused the gears to break. If the rear end is repairable then get the broken parts replaced. If it's too damaged then I recommend...
My Yukon Denali is AWD. With front tires off the ground, should the drive shaft and both tires spin freely of each other?
Hi there, thanks for writing in. I'd be happy to help. This is a normal thing. Your front axle carrier has an electronic actuator that locks it in only when the transfer case is locked into 4WD. The fact that...
Noise from rear when car gets straight after turning left or right
I am assuming the mechanic drove it and already identified the sound as from the rear of the car but that would have to be confirmed preferably by getting a second opinion because obviously you still have the original problem....
Routine fluid changes
Hello. Due to the way cars are built today, it is not common to have issues or material build up during break in. If anything you can change the fluids within the first 10,000 miles if you are worried about...
Front differential not working properly
Hi there, thanks for writing in. If the tires can be stopped and the driveshaft continues to spin, then there is an actuator assembly issue in the front differential. If the driveshaft stops spinning, then the problem may be in...
Loud rough ride coming from the front of car.
Hey there, thanks for writing in to YourMechanic. There are many things this may be, ranging from front differential problems to an out of balance tire to bad wheel bearings. For an issue like this I would recommend having a...
how munch does the rear differential hold?
Hello there, the fluid capacity of your 2002 Chevy Silverado 3500 rear differential is determined by a few different factors. The normal capacity is approximately 4 quarts. This changes based on if your truck is equipped with the limited slip...
How many miles you need change differential oil
Hello, thanks for writing in about your 2001 Toyota Sequoia. The fluid change intervals should be listed in the owners manual for the vehicle. As a rule of thumb, the differential fluid should be changed every 30,000-50,000 miles. If you'd...
Differential oil and spark plugs needed at maintenance?
Do not do the service unless they can tell you why this is needed since the owners manual does not recommend it yet. If there is a recall, then it should not cost you to get it done. Verify with...
Removal of the rear axle from the rear deferential, any special way to do so? Pulling on it doesn't work.
There is a special axle remover tool or a slide hammer that can cause the axle to release from the housing.

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