Q: Can your front differential make noise and cause vibration with increased rpm while in park? It's a 2008 jeep commander.

asked by on June 13, 2017

I have an 08 jeep commander AWD. Was hit by two deer recently and when I tried to drive the car to the shop I noticed humming and felt vibration in the pedal and floor board. Checked it in park and determined it is rpm based. Begins at 2 thousand rpm and gets real bad around 4 thousand changing in pitch. The shop said it's the front differential bearing but I said that doesn't make sense if it does it in park. I thought motor or transmission mount.

Any part that was impacted in the collision, for instance the crankshaft harmonic balancer, could be a cause. Of course, the differential, including bearings, is not implicated if the car is not moving when you are able to generate the noise. I would remove the serpentine belt and run the engine momentarily just to be sure the issue is not with a belt driven accessory. Apart from that, all other rotating components, such as the torque converter, as well as the engine mounts will have to be carefully checked out. There is also a possibility that the vibration stems from an engine management issue, typically a sensor or electronic controls. If you want the required diagnostic steps performed by a certified Mechanic, dispatched by YourMechanic right to your location, please request a vehicle vibration diagnostic and the responding certified mechanic will get this taken care of for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

I would like to know why my rear end shakes really bad at 55 mph

Hello, thank you for writing in. The vehicle is likely having an issue with the tires or suspension. Typically you start by testing the simpler possibilities and work your way to the more complicated fixes. With that said, one of...

Horn stays on

Based on the information you provided, it sounds like you have a short in the horn's wiring. It may be at the steering wheel but could also be elsewhere. Electrical tests will be able to confirm the location of the...

Replace wheel bearins for $500 or buy new car?

Hello. In my opinion, I do not think that a bearing failure would constitute replacing a vehicle. Bearings are a common wear item that needs to be replaced every now and then. If the vehicle is still in good shape,...

Related articles

The Best Used Cars to Buy If You Live in a Cold Climate
If If you live in a cold climate, likely one of your biggest concerns when you are considering which used vehicle you should buy is how well it will perform in snowy, icy conditions. We have evaluated a number...
Are Switches Inside a Car Waterproof?
The The electrical switches inside your car control functions throughout your vehicle. You have switches that turn your headlights and radio on or off, adjust the volume of your sound system, open the power windows, and lock the power door...
The Best Used Cars to Buy If You’re a Photographer
If If you are a photographer, and you’re considering buying a used car, the big thing to consider is the type of photography you do. Thanks to the advances in digital photography, chances are you’re not hauling around a lot...