HELP! Humming @ 40 mph?

[genejock]

OK, here's the problem... When ever I drive from about 40 to 50 mph I hear this moderatly loud humming noise (that I can also feel in the floorboard with my feet, like a vibration) that appears to come from the front of the car, I want to say front passenger side. At speeds above 50 or below 40 the humming/vibration seems to vanish.

Also, in 4lo at around 20 or so mph when the throttle is not applied (just cruising) the passenger side hub makes an horrible whining noise. I checked out the hubs and they seem to be OK, based on the information I have gathered about the el-cheapo auto hubs my truck has. No broken parts, etc. Plus I just lubed them a few months ago.

I should note that the truck has a relatively new tranny in it (about 10K on it so far) but it shifts great, fluid is fine (not burnt) and I dont drive it hard.

So, what should I do? This noise/vibration is super annoying and I dont want to do any further damage by continuing to drive with it this way. Thanks in advance for any help.

Steve

 

[95ExplorerLtd]

Maybe an out-of-balance tire?

 

[Paul]

U-Joints

The rumbling vibration could be your Universal Joints. If they haven't been replaced yet, they are probably due...

Paul

 

[HIX]

Sorry...I can't help myself!

I don't mind Hummmmers! Reminds me of College!

 

[97XLT]

Possibly wheel bearings or as i've seen recently...power steering fluid.

 

[CONavajo]

If you haven't found the problem yet definately pull the rotor and check the inner wheel bearing. This noise was on my truck and it was a bad inner, caused by lousy mechanics who couldn't figure out how the locknuts hold the assembly tight. You will need a special locknut socket ($10) and a torque wrench to get it just right again but it is an easy process, and get a Haynes manual, it has all the torque specs.

 

[Lincolnunit]

I have the same problem, dealership replaced the PTU, vibration is gone but the noise is still there. Wheel was balanced as well still noisy

 

[RangerX]

Props to you for using the search feature so well, but this old thread was about first generation Explorers, a completely different animal from your 2016 model.