The past few days when I start the truck up I here a loud noise. It kind of sounds like striped gears or like a gear missing a few teeth. Once the truck is started the noise is going till I turn off the truck and turn the key again. Some times the sound is worse then other times and there are a few times where I don't hear anything but the engine starting up.
Wondering what it might be and if it might be easy enough to fix myself.