I have a loud sqeak noice from under the truck while driving that I just noiticed at slow speed. It is not brake related, and it doesnt seem to do it while in neutral, only in drive. I just noticed it today, so I havent got too deep in troubleshooting yet. Can anyone point me in the right direction on what to search for? Driveshaft, differential, wheel bearings? I hope it is something a lot more simple than afy of those things, but would like to eliminate the worst things.