When I first start the truck it's quiet. Then, I hear a groaning sound as it warms up and then it disappears. Changed the belt cause this did make some noise but apparently that's not it. I believe it may be a bearing starting to go but quite hard to pinpoint at this time. Anyone have this happen or know what might be starting to go. Thanks!

 

Where is it coming from? A bearing going out would make a sound much more like a squeaking or grinding.

 

if its a roaring sound. it could be your clutch fan.

 

Not the roaring sound from the clutch fan ... I'm familiar with that. I did change the belt a few days ago and I don't seem to hear the noise now however, it's really warm here the last few days and I don't know if that is a contributer or not. I had this in past vehicles but usually it don't go away. I'm hoping it was just the belt. Time will tell. Thanks for the response!

 

Most likely it was the clutch fan when you shut the vehicle off before it was prolly going to kick on. there's probibly nothing wrong with it if you dont here it ne more just a glitch my truck does it when its warm and its normally warm in FL.