I have a loud humming sound from the rear

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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a hum is a very vague request a hum can be from tires ,engine ,driveshafts rear or front axles etc advise to bring back to dealer who preformed work on vehicle and advise them that the hum wasnt their prior to repair work also the work should be under warranty

Probably rear brakes. Clean them up or get them looked at and try again.

check your rear driveshaft for loosness

MOST of the hums after a while come from the diff as the back axle does the driving and almost all its life runs the same way except when going in reverse ,is the rear diff meshing and worn on both the crownwheel and the pinion and the humming gets slightly louder the faster you go and almost goes when almost stopped and this can also be the slight vibration you get so get the diff oil drained and refilled and check if there is any metal in the oil when drained if so thats your problem But it will last for years like that..Let me know how you get on RON

sounds like your wheel bearing has gone bad.does is quiet alittle say on a sharp corner if so wheel bearing.

Sounds like the front hub bearing assembly.

CHECK YOUR TRANSFER CASE FLUID LEVEL ,SOUNDS LIKE IT NEEDS FLUID ,IF SO YOU FRIED IT.

It's the wheel bearing. Guaranteed. Just replaced mine. Go to Audiworld tech articles for step by step instructions on how to test the wheel bearings. They must have been put in wrong last time or they just went out again.

this sound your explaining sounds like it could be a bad spindal bearing or bad belt in your tire try to swap tires from front to rear do not criss cross x if there radials see if its still the same