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differentials

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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.
How to Replace a Differential Gasket
Differential gaskets seals the differential housing and protects the rear-end gears and axles from exposure to the elements.
How to Replace a Differential Output Seal
Differential output seals prevent fluid from leaking out of the differential, causing the differential to overheat and cause damage to your car.
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

Question
2wd truck. Rear wheels "grabbing" when making tight turns.
Your truck has a limited slip differential and in most cases this is normal operation when making tight turns. If the turns you began to notice the grabbing are turns you have taken many times before, then it may be...
Question
Can I use a 97 Mustang rear differential on 02 gt Mustang?
Hi there. For the year 1997, there are 6 different gear ratios used for the differentials and in the year 2002 there are 2 different gear ratios used for the differentials on the Mustangs. I recommend checking the gear ratio...
Question
4 wheel drive is very noisy.
Hi there. Check the front axle for an axle that could be damaged, a universal joint in the front axle that could be broken, or the differential gears could be damaged. If you have part time 4WD, meaning you have...
Question
I have a front differential leak and I hear a whining noise when accelerating or decelerating.
Hi there. The whining noise from the differential could be the pinion gears being worn out or the bearings to the cage could be worn out. As far as replacing the oil in the differential, it is best to replace...
Question
Car is lurching at 10 mph after changing the rear differential.
Hi there. The symptoms that you are experiencing is that the gear ratios from the front axle and the rear axle are different and causing the vehicle to lurch at low speeds. Take the vehicle off road on a dirt...
Question
Which GM pick up rear end has posi, disc brakes and will match my 67 measurements?
Hi there. The axle from a 2001 Chevrolet Camaro should fit your 67 GMC. The axle is about the width of your original axle and it has disc brakes with the posi loc traction control in the differential. If you...
Question
Car making squealing noise like some things being sheared off. 1991 Ford Mustang
Hello - setting up the ring and pinion gears in the differential is a highly specialized task, requiring specialized knowledge and tools. And the parts are not inexpensive, so all the more important to get this right up front. Check...
Question
Does a differential fluid change include opening, scraping, and replacing the gasket seal?
Hello. Depending on which way you choose to service the fluid, it may be necessary to remove, clean, and reseal the differential cover. As there is no drain plug on this differential housing, draining the differential fluid will either require...
Question
Noise coming from the rear end.
Hi there. Sounds like the bearing on the differential or the wheel bearing on the rear wheels are worn. Raise up the vehicle and check the bearings by using a pry bar and prying up on the tire. See if...
Question
I have a Chrys 300, when I turn it on and put it into drive I hear a grinding noise. I think it's the drive shaft or differential.
Billing question sent to CS for the cost to repair the driveshaft or differential from making a grinding noise.
Question
Can I change gear ratio of my rearend if I also change the front
When it comes to a four wheel drive vehicle, it doesn't really matter what gears you use, as long as they match on the front and rear. So, if you wanted to switch to a 355 gear, that would be...
Question
How often should the front & rear differential be replaced.2006 Lexus RX330
Hello - this recommend seems unusual. As long as the lubricant level in the differentials is of the correct type, and kept at recommend levels (i.e. no leaks), differentials should not be failing with this frequency. Off-roading or trailer pulling...
Question
Should there be any play on the CV shaft where it goes into the transmission?
Typically, on the inboard joint of a CV axle, you will be able to readily detect (feel) movement because the shaft into the transmission rides on a bushing that has some clearance. If the movement is "excessive", that could mean...
Question
How often should I change the rear differential fluid on a 2016 Acura RDX?
Hi there. The fluid should be changed about every 15,000 to 20,000 miles to remove all contanimates and metal from the gears as they wear. I recommend having your differential serviced and use the OEM specified lubrication to maximize the...
Question
I did a burnout out and only my right wheel was spinning my left wasn't
The rearend in your vehicle is equipped with what is called an "open" differential. In other words, it will only spin one wheel at a time. In order for both wheels to spin at the same time, your vehicle would...
Question
Retainer clip problem on rear end 2003 Dodge Ram 1500
Hi there - while not an epidemic problem, rear ends that are "worked" harder (i.e. trailer towing, off-road, etc.) or simply high mileage such as yours will see this problem. There is enough of a side load on these clips...
Question
recall rear axle pinion nut
Hello there, the recall for your 2005 Dodge Ram 1500 only covers adding a retention device to the rear differential pinion nut. This does not require draining the fluid from the differential or opening the rear cover. The differential fluid...
Question
Front axle shim washer was bent during re install.
Hi there. For your question, this determines on how the gear was installed in the differential. Since you have a Dana 44 front axle design, the only thing that I could say is that the ring gear could have been...
Question
Differential makes a whining noise when ever the car is moving (accelerate or decelerate)
You should have the vehicle road tested by a mechanic like one from YourMechanic to see if the noise is inside the differential or in one of the axle hub bearings. The vehicle may have to be run on a...
Question
How to remove a keeper stuck in the right differential shaft housing? 2005 GMC Yukon XL 1500
Hello - I have had reasonable success removing keepers and snap rings using a combination of picks and magnetic probes. Pick sets (which come in a variety of straight and angled configurations) usually get the offending bit loose, and the...

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