The rear hubs more than likely need grease. If this isn't the case then the axles may need greased or check the tires for broken belts.
A computer tower may make a surging noise rather than a constant humming noise if the case's screws are not properly tightened. Another reason for such a surging noise is the imminent failure of a fan.
Transfer case pump grinding a hole through the casing, U-Joints, bearings.
Greetings, I just had the same issue with my Ford Excursion but was doing the clicking noise in reverse and in either 2 wheel drive or 4X4. I went under and checke4d the transfer case shift motor and found the noise coming from there. Changed it and problem solved. Just something to check out. Kenny 130256405201 check out this E-Bay number ( Item # ) Pretty cheap on there for the motor Answer If the noise is coming from inside, the chain has failed.
I had a 2000 Explorer with a grinding noise coming from the front . It my case, it was the axle bearing assembly on both sides. They are around 200 per side to purchase.
Depends on which part of the truck the noise is coming from. Could be an u-joint, a wheel bearing, a failed transfer case......
Some people have reported a clicking noise in the transfer case when it's low on fluid, so check the level. If the level is fine, use a screen to drain the fluid through and watch for metal flakes. If you find them, the transfer case would need to be rebuilt.
bad transfer case
It's toast, replace it. Or have flying chunks of metal stuck in your ass.
on the top of the transmission its on the transfer case with 3 vacuum lines coming out of it.
The noise may be the drive Cain in the 4 wheel drive transfer case . It stretches with age and can hit againt the transfer case sides .Makes a rattling sound . Most noticed will stopped ib gear .
Your transfer case could be low on fluid...you could simply add fluid to it and the growling could stop, but be careful, because it could me more serious that it seems. but that's where I would start