With the goop on them they definitely look like diff cover bolts.

 

Yes on the front driveshaft because of the joint on it.
Check your differential mounts

 

I'm thinking someone is a winner with stating these may be Transmission Pan bolts...let us know when you figure it out.

 

There too small for diff cover bolts, I checked under there and the diff cover bolts are bigger than these. Next is to check the tranny pan

 

Also I feel sometimes like something is sliding underneath the truck when I take off from a red light, like the tranny is just moving around. Kind of a thump.

 

All bolts accounted for on the belly pan, I'm gona have to take it to the deanship and have them take a look cause I can't find anywhere in the engine compartment, underneath front middle or rear where they could have come from!

 

All bolts accounted for on the belly pan, I have checked the engine compartment all the way to the rear bumper and can't find where they go. I guess il have to take it tot he dealership to take a look cause I need to find out asap in case its something that needs to be bolted back on lol

 

OR, someone is playing a joke on you... just guessing.

 

I just moved to a new neighborhood and don't think my neighbors would do that, they are NEVER outside first off and I have already asked my family and they would have told me by now if someone was playing a prank on me. On a more serious note I found another one in my driveway today and its starting to worry me. I feel a bump sometimes taking off from a red-light, hitting the throttle hard or not I feel it. Also I noticed that the floorboard behind my bucket seat was pretty damn warm yesterday traveling back from AL. Im afraid the tranny may be lose or some craziness is going on

 

Those are NOT transmission mount bolts. Since there is no scale to your picture, I still think they're tranny pan bolts. Belly pan, what belly pan?