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Symptoms of a Bad or Failing Differential Gasket
If you find traces of oil on the underside of the differential, puddles of fluid, or whining sounds, you may need to replace the differential gasket.
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 Front Output Shaft Bearing
Common signs include a noisy drivetrain, excessive vibrations, and oil leaking from the transfer case in all-wheel or four-wheel vehicles.
Symptoms of a Bad or Failing Headlight Door Motor
If the headlight doors are stuck open, stuck closed, or make a grinding noise, you may need to replace the headlight door motor.
Symptoms of Bad or Failing Spring Insulators
Common signs include the vehicle bottoming out, excessive road noise, grinding noises while turning, and damage to front tires and brakes.
Symptoms of a Bad or Failing Transfer Case Output Shaft Seal
Common signs include difficulty shifting gears, grinding noises coming from underneath the vehicle, and jumping in and out of four-wheel drive.
How Long Does a Drive Belt Tensioner Last?
In order to keep the proper tension on your vehicle's serpentine belt, a drive belt tensioner is used. This is a pulley that is either mounted to an adjustable pivot point...
How Long Does a Differential / Gear Oil Last?
The differential is normally located at the rear of your vehicle and underneath the car. It is essential that it stays lubricated with differential or gear oil for it to work properly and...
How Long Does a Timing Cover Last?
A timing cover protects parts such as the timing belt, timing chain, and gears inside of your vehicle. They are made from either plastic, metal, or a combination of synthetic materials....

Related questions

Question
I have a 2006 BMW X5. my brakes just started grinding. Do I need to get them done now or can I wait for a few days
Hello, thank you for writing in. It is difficult to say how bad the issue is without doing further inspections on the brake system. The grinding may be coming from something stuck in the brakes (between the caliper and the...
Question
What would cause a rattling/grinding sound from the front side of the motor in my 2005 Chevrolet Impala
Hello, Most of the time this is caused by an issue with one of the accessory pulleys. Most of the time it is the water pump due to an internal bearing failure. I usually pull the belt off and turn...
Question
I have a 2007 BMW 328XI and noticed that I was experiencing a load grinding noise when reversing and occasionally when turning. I
Hello, thank you for writing in. Without inspecting the vehicle, there is no way of knowing how badly the vehicle is damaged, nor how extensive the damage is. With that being said, the steering linkage and suspension are both susceptible...
Question
My engine/transmission has a rough/growling when in gear and at acceleration.
Hello, thank you for writing in. Everything you have done up to this point has been valid. However, there are still an a high number of possible components that can cause these symptoms. You will want to spend some time...
Question
What can cause my front driver side wheel to grind during acceleration in my 2007 Chevrolet HHR
Hi there. It sounds like you have a failing front hub bearing. When they begin to fail they will sound just like what you are explaining. It can also be caused by a bad cv axle or an issue with...
Question
Truck makes grinding noise when 4WD is engaged and put under load only.
Hello, thank you for writing in. Issues like this can be difficult to locate, because you need the vehicle to be under a similar load to recreate the noise. With that being said, you may have a vacuum issue causing...
Question
Grinding noise when braking and turning left.
Hi there. The grinding noise seems to be a rotating item on your vehicle. Check the wheel bearings on the front of the vehicle and see if there is any dust around them. If there is dust, then the bearing...
Question
Transmission noise after shutting down engine.
Hello. The grinding noise is likely an internal transmission issue. Putting the new transmission fluid inside of it likely freed up some already sticking components that were already beyond tolerance ranges and they are now becoming abrasive. I would suggest...
Question
Grinding/scraping noise coming from back of car
Hello, thank you for writing in. If the sound is not coming from the differential, but is coming from that area, you will want to check the driveline and the axles. Look for anything that is rubbing, has a worn...
Question
Hyundai Accent 2003 grinds when steering left or going straight.
Among the likely causes of this sort of noise are the outer CV axle joint and/or the wheel bearing. You describe the noise as clear and obvious and thus the mechanic should be able to pinpoint it very readily on...
Question
brakes
Hello, thank you for writing in. Your brake pads likely need to be replaced. That grinding you are hearing is most likely metal-on-metal friction due to a lack of brake pad material. You can inspect the brake pads to see...
Question
Grinding noise when in Park and Neutral.
The noise is either coming from the clutches slipping inside the transmission or a loose exhaust shield that is rattling. Lift up the vehicle and put it on jack stands. Then go under the vehicle and feel around for anything...
Question
Grinding
Hello, thank you for writing in. A grinding noise when turning can come from the mechanical linkage that allows your steering wheel to turn the tires, or it can come from the hydraulic system that assists you in turning. Start...
Question
I accidentally double turned the key while trying to start up my car now it makes a grinding noise 2002 Ford Taurus
Hello. Most of the time when this occurs it is because the second start caused damage to the starter. If the grind only happened once and did not occur again then it is fine. If the noise is constant now...
Question
Grinding in front right wheel
Hello, and thank you for writing in. When dealing with these issues there needs to be a general inspection done of the drive shaft, transfer case, differentials, and axles. Look for any obvious signs of damage, fluid leaking, or parts...
Question
1986 Chevy s10 with 171000 miles. Automatic with manual 4wd. Knocking/grinding noise when driving, any speed, worse when going straight.
Hi there. Look under the vehicle and see if the frame bracket is loose and dragging under the vehicle. If there is nothing dragging under the vehicle, then either the brakes are sticking and rubbing on the rotors or the...
Question
Grinding noise while turning left and right
Hello, thank you for writing in. Grinding noises like this can be incredibly hard to diagnose. The power steering pump may be to blame. Even if it is not hard to steer, it can make similar noises. Keep that in...
Question
How do you know which side to fix?
Hi there - beside eyes, ears and a stethoscope (yes, really), our mechanics are trained to understand how, and from where, sound and vibration originate when there is a problem. I recommend a [https://www.yourmechanic.com/services/grinding-noise-when-key-turns-in-ignition-inspection) performed by a mobile, professional mechanic,...
Question
When trying to reverse my clutch makes a grinding noise and stalls out. Also when driving down the highway theres a rattling sound
The rattling noise under the vehicle could be a loose heat shield that could be moving around when the wind is moving fast under the vehicle. For the grinding issue when going in reverse, the reverse gear could have broken...
Question
2005 GMC with Denali transmission grinding in all gears including neutral. It will not accelerate and also doesn't have park.
Hi there. Your transmission is slipping all of the gears inside and may be due to a broken stator clutch and a broken torque converter. A torque converter that has failed will cause a grinding noise if the stator breaks...

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