Weird humming noise

[MarkR]

I can hear a weird humming noise coming from the fire wall only when I'm in the truck. I have the fan and AC turned off. I can not hear it when I'm under the hood or under the truck. Only when I'm in the cab. It's kind of a high pitched humming/grinding noise. As soon as I hit the gas it goes away. I also hear a weird chirping sound right before it changes gears.
Maybe the torque converter?

Thanks'
Mark

 

[rucr8z2]

maybe but try checking your distributor sometimes they have play in them and will make noise that you can't hear with all the motor noise. But its right up against the firewall.....Crawl under and listen to the front of the trans but don't get run over! LOL