Loud growling humming noise at 1300 to 1700 rpm. This just within the past couple of months. Mileage 138k. Speed 20-40 mph.

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Humming Noise Front End- Any Ideas? - Ford Explorer and Ranger ...

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Dec 18, 2008 - 19 posts - ‎16 authors
Have a 98- Eddie 4.0 SOHC, 4WD with a 100,000 mi. When driving it has a humming noise, it almost sounds like a bad tire, or a ... I start to hear the humming noise at 20 mph, it is very loud at 40 to 50 mph ... 94 XLT-95 FX4. humming gets louder as speed increases
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Does it change with vehicle speed or engine rpm?

vehicle speed: check wheel bearings lift vehicle and support it with jack stands grab the wheel at the 12 and 6 o'clock positions( to rule out steering linkage play) and wiggle in and out. A bad bearing that loud will have some play.

"Loud humming" could describe many of the noises that your minivan may make. Let's start with the basics: do you hear the noise only when the van is in motion or also when the van is stopped? If you can hear the noise even when the van isn't moving, you're most likely looking at something in the engine compartment. Your serpentine belt and the alternator bearings (and, to a lesser likelihood, your power steering pump) are all sources of noise "in there." An A/C compressor on its last legs may also vibrate and cause a humming sound, though that's usually described as more of a "growl."

If you can only hear the noise when the car is in motion, the next question is whether it changes pitch/volume due to engine speed or due to road speed? For example, does the noise get quieter (momentarily, perhaps) when the transmission shifts gears? Or, does the noise simply get louder/change characteristics in a linear way as the van gets faster and/or slower?

Depending on the mileage on your van, the transmissions have been known to get quite noisy after a while, especially if you are doing sustained high-speed driving. The solution for that particular problem isn't cheap, as it involves replacing or rebuilding the transmission (the shift bands may be fine; the noise is caused by bearing wear, seal failure, and other sundry issues that still require pulling the transmission). A less expensive problem is that you might have a problem with one of your tires--a tire with separating belts may make a noise like this as it slowly tears itself apart. If you hit something hard with the undercarriage of the van, you might have a drive shaft that's slightly bent and hence is causing some sympathetic vibrations in the car because it's out of balance.

Depending on the cause, your humming sound may be one of those things that comes with driving an older car--or it may be a sign of the imminent failure of something serious. It's worth getting things checked out again to try to find the cause of the problem. You'll feel a lot better knowing what it is, even if it's something you choose not to fix.

When does the noise occur, while driving only, or driving and idle, in gear, or in neutral and park? If it occurs all the time (while driving and at a stand still in cold weather) it could be the fuel pump. If it occurs only while driving, it may be a wheel bearing. Describe the noise (humming, grinding, whirring, etc), and what is the mileage on the Pilot? Answer my questions so I can fine tune my answer. Thanks!

hi this sounds like you have a wheel bearing that has gone u/s the way to find out which one is to individually jack each wheel up and spin the wheel first you might hear a grinding noise, if not you can pull the bottom of the wheel and push the top in a rocking motion top to bottom, left to right if you get a large amount of movement then this will also point out which wheel it is....hope that helps

The fan is rubbing ,was any of you srews striped, if they are replace with some larger screws and that will realiagn the motor

Not sure if this is this answer, but I had a problem with a noise under the front end once....turned out to be the cowling under the front bumper....it was broken and it took a high speed to force it down enough to hit the road.

Good luck!!

Chevrolet has a common problem with integral hub and wheel bearings wearing due to exessive use or lack of lubrication, the balls or rollers and races become pitted ,scored or just plain damaged which will infact cause a loud humming or growling noise. I have had some humm at about the same speed but usually they will start to make noise at any speed. I would have to hear the noise to be sure cause there are many things to cause a humming noise like odd tire wear, bad idler pully bearings, e.t.c. the tires should be lifted checked for excessive play in the bearing. Take tire off depress brake piston in just enough secure brake rotor use stethoscope spin hub while listening. maybe he replaced wrong side seen that alot, seen tire noise mistaken for bad bearing to if struts or shocks are worn can cause tires to be choppy. I would recommend taken back 300 dollars is alot of money to not fix your problem.

It is at least one of your wheel bearings. I had all four of mine replaced before 40000 miles I hope that it is under warrantee