99 Explorer - Whirl/Whine While in Gear

[fender1]

I have a 1999 Ford Explorer XLT with a 4.0 SOHC and 178,000 miles. I had the transmission rebuilt at 120,000 miles. I just recently noticed that there is a whirl or whine noise coming from under the vehicle when I have it in gear and the noise appears to get louder while accelerating. Does anyone have any suggestions?

Note: The noise does not exist while in Park or Neutral - only while in gear. At high speeds the noise isn't as noticable.

 

[Lazzman]

If yours is a 4x4 it could be the transfer case.

Same thing happened to mine when I let off the gas when cruising, a whirring or whining noise. When my foot was on the gas the noise was not present.

My transmission shop was able to source a used replacement for me and got the job done for $800. I believe a new one from Ford was like $2200.00

I have a '98 Sport that had about 165,000mi at the time this happened.

 

[fender1]

If yours is a 4x4 it could be the transfer case.

Same thing happened to mine when I let off the gas when cruising, a whirring or whining noise. When my foot was on the gas the noise was not present.

My transmission shop was able to source a used replacement for me and got the job done for $800. I believe a new one from Ford was like $2200.00

I have a '98 Sport that had about 165,000mi at the time this happened.

My Explorer is a 4x4. The noise seems to start as soon as it's placed in gear and intensifies when I begin to accellerate, even at low speeds while driving through my development.

 

[BrianDye]

Mine at 150k did that, but it was just the alternator, HORRIBLY loud whine when I first bought it, then after about 70mi drive home, it was gone. This was just a few days ago, haha, still gotta replace it

 

[fender1]

Mine at 150k did that, but it was just the alternator, HORRIBLY loud whine when I first bought it, then after about 70mi drive home, it was gone. This was just a few days ago, haha, still gotta replace it

I had originally hoped the noise was coming from the engine compartment, but it seems to be located more underneath the vehicle.

 

[BrianDye]

Ah that cant ever be good, heres for hoping its just somethin minor