My 2005 Chevy trailblazer started to make a humming noise...when I get to 30mph to 40 mph it seems the worst. It kind of feels like I have the car in Drive 2, it feels like it is restricted. It sounds like it is coming from the right front of the vehicle. There is 84,000 miles on it and at 30,000 miles I had the left front wheel bearing replaced. How can I tell for sure if it is a wheel bearing or just my tires. They are a few years old and were not cheap.
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it could be center bearing, if its going bad it can also cause a vibration, make sure you have sufficient fluid in the diff as well, you can also get a noise and vibration from collapsed motor or trans mounts
squeakey69 is right it sounds like you have a wheel bearing problem cobalts are notorious for wheel bearings going bad i would go ahead and change both front bearings because if one is going bad the other usually isnt far behind hope this helps.
I hate to say it, but it sounds like something in the differential - transmission. The part about the noise and coasting fits a differential bearing noise. Making turns could put extra load on the bearings and gears in the transmission.
ok it could be two things. it could be rear wheel bearings or a rear diff. If its a high pitch wine then its worn gears in your differential. its needs serviced or replaced. If it more of a rumbling or grinding hum, coming only from one side or both) then there are bad wheel bearings.
Find a quiet empty stretch of road. Go 50 mph, put the trans in NEUTRAL and shut the engine. If noise is still there, swing car left and right to detect noise differences. Could be hub or axle bearings. Not engine or trans if noise is still there. Hope this helps
sound like possible fuel filter has some dirt in it you are suspose to change every timr you change oil or the fuel pump is over heating when you drive it try the filter first the
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