I wanted to know if someone can narrow it down for me. I think its something to to with the front differential but im not 100%. It a loud hum that you can feel everywhere in the truck. The 4x4 works but there was a thud a while ago and the noise is only getting worse. Do you think it could be my front differential or maybe something a bit cheaper? It does it at all time while driving. I know its not the tires either. Let me know what you all think.. Thanks

I wanted to know if someone can narrow it down for me. I think its something to to with the front differential but im not 100%. It a loud hum that you can feel everywhere in the truck. The 4x4 works but there was a thud a while ago and the noise is only getting worse. Do you think it could be my front differential or maybe something a bit cheaper? It does it at all time while driving. I know its not the tires either. Let me know what you all think.. Thanks
Hey i have a 99 ford explorer xlt on 22"s and it makes that same rattle. It also idles low and sometimes stalls if it is just parked. Did yours ever have this problem? I cant figure out why it stalls. i already replaced the throttle position sensor but it did not rid of the stalling problem. i can't figure out what it is causing it to stall.

It could be a bad wheel bearing and that is one indication of one.

Hey i have a 99 ford explorer xlt on 22"s and it makes that same rattle. It also idles low and sometimes stalls if it is just parked. Did yours ever have this problem? I cant figure out why it stalls. i already replaced the throttle position sensor but it did not rid of the stalling problem. i can't figure out what it is causing it to stall.

I don't think a wheel bearing would cause stalling. ;)

Other than the stalling and low idle, does the engine run smoothly? If so, do you have any non-OEM components under the hood such as an oiled air filter, aftermarket exhaust, "chip" on the intake air temp sensor plug, etc.? How about maintenance? When's the last time a tune up was performed? Do you routinely use fuel injector cleaner? Which engine does your Explorer have?

Initial suggestions would be to check the Idle Air Control (IAC) for a bad servo or carbon build up. You could also have a vacuum leak or possible a dirty Mass Air Flow (MAF) sensor. Spark plugs or restricted fuel filter are possibilities as well. Lots of options, for more detail from us, you need to provide some.

-Rod

I have never had a stalling problem. Sounds like a fuel issue to me.

So any clue of how much labor is involved with doing this?

hey stang it could be wheel bearing as wafred suggested have you checked
it

Does the noise change if running down a highway and you curve right or left?
Mine did and I changed the wheel bearing / speed sensor and it fixed it.

Good Luck