Q: Rear differential humming

asked by on

I can hear a humming noise coming from the rear differential of my truck.

Hi there. A humming noise usually indicates a worn pinion bearing or an incorrect backlash setting on the rear differential between the ring and pinion gear. Sometimes, if the pinion bearing develops play due to wear, the pinion gear will move away from the ring gear creating excessive clearance and a gear whine. The pinion preload and pinion depth will need to be checked and a contact pattern check completed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. Rear differential humming

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: Does a Lexus ES 330 have front and back valve cover gaskets

Your vehicle has two valve covers, one over each cylinder head, and so you will need two valve cover gaskets in total. You can obtain am instant, detailed written quote, and schedule the repair to suit your needs, by simply...

Q: Doesn't stay running when I hit 35 mph.

Hello. We will be happy to assist you. The vehicle cutting off will likely be related to a couple of things. Weak fuel pressure (could be caused by a faulty fuel filter or fuel pressure regulator) bad crank position sensor,...

Q: Humming sound when car is running

Hey there. A humming sound is a common noise made by bad wheel bearings or defective tires. A wheel bearing plays a huge role in the safety and stability of a vehicle. Being that they are such crucial components, I...

Related articles

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...