so I have owned my truck for about 3 months now and I know I have to replace the front axle seal but I happened to be driving the other day and I usually have the radio up fairly loud. I was taking my son to school and we were talking so I turned the radio off, shortly after I started driving away I heard a weird noise coming from the engine, the truck is running fine and nothing seems wrong, so I dropped him off and came back home, popped the hood and fired it up, it sounds like a bearing or something on one of the belt drive components. I couldnt pin point which one it was but it wasnt doing it non stop! Sometimes it would do it for a secong or 2 then be quiet for 10 seconds then do it again, no pattern at all, just sparatic! Any ideas on what it might be, I was gonna start with the pulleys and go from there but my father said it looks like the pulley on the very bottom of the motor appears to be the one making the noise! I dunno