Ok, I am asking for help again. You all helped me out with the check engine light issue I had so I am hoping u can help me now. There is a crazy loud squeeling noise in the front part of my 4.0L. We have put a new alternater, New idoler pully, tightened the belt and kinda checked the pully alignment. Still squeeling. The belt looks fine so I went and bought some belt quiet stuff and sprayed it on there and the squawk got louder! I also did the water squirt test on the ribbed part of the belt and when sprayed it stops squawking then starts again. The gauges are all good and there doesn't seem to be leaking and coolant so I have also ruled out water pump. Does anybody know what this could be? I can't even drive it because it is so loud!! But other than the noise, it runs like a champ!! Help,please!!! Thanks!