Okay.... I started getting a slight whining noise during acceleration. The noise has gotten worse and only occurs when I get into higher RPMs right before shifting. When I press in the clutch the noise goes away during the shift. I can't drop off the truck until later this week. Also, a few days before the whine started my speedo stopped working until a mile or two down the road. Not sure if it's related but wanted to throw that out there in case it is. Any thoughts??? I'd like to have an idea if it's a belt or something before I drop it off. I'd attempt to diagnose myself but I've been getting home too late to tool around with it. Any advice is welcomed!!!! Thanks!

 

posibly your your front or rear differential.

 

Okay... maybe it's the front. That's where the noise is coming from.