Skip the auto shop - Our mechanics make house calls

Q: Where the driver's shaft thing that spins is slinging oil when I drive, but if doesn't leak when my car is parked

asked by on

The drivers shaft has oil leakage on it and slinging it all under my car but the oil doesn't leak when Im parked so what could be making this leak and it makes a noise when I'm driving and when I press my gas pedal I hear a whine only when I press the gas do I hear the whining but the kind of grinding noise is constant when moving

My car has 172000 miles.
My car has an automatic transmission.

You don’t mention which end of the driveshaft is leaking oil, but in either case, the problem would be worn bushings or bearings that allows the driveshaft to "wobble" enough that the oil seal is leaking (the oil seal is probably worn out as well given your mileage). For the transmission, this would be a worn tailshaft housing bushing, which the driveshaft yoke slides in/out of.

For the differential end, a pinion bearing may be worn. Given the "whine" you mention under load, the ring and pinion gears, and bearings, in the differential are worn as well. Both the seal and bushing/bearing for the leaking end of the driveshaft need to be replaced.

You may also have a wheel bearing that is worn - that would cause the constant grinding noise you hear. In order to get this properly diagnosed, have a certified professional, like one from YourMechanic, inspect the leak and grinding/whining sound in person to pinpoint the needed repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  • Home
  • Questions
  • Where the driver's shaft thing that spins is slinging oil when I drive, but if doesn't leak when my car is parked

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: When refilling gas tank, gas overflows before tank is full.

The most common cause of this type of problem is when the fuel filler neck's inner tube comes off of the neck itself. You will need to have the filler neck removed to check to see if the inner tube...

Q: Exhaust system is rusty from catalytic converter to muffler?

Hello, thank you for writing in. Rust damage to the exhaust system will only increase in severity over time. Where you live, it is likely to happen more quickly then some other geographic locations. Over time the holes will develop...

Q: Emergency brake seized up

On a drum brake setup, the parking brake is integrated with the service brakes. If the parking brake has failed, other parts of the rear brake system will also require replacement as the same part may be used for two...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...