sounds like one of the accessory drive bearings is gone.... my bet would be on the idler pulley, but COULD be alternator, water or PS pumps.
remove the belt and see if any of the pulleys can be wobbled by hand. they SHOULD be rock solid with no noticeable movement. start with the idler which is the pulley that's just bolted to the block, not driving any motor or pump
[FONT="Comic Sans MS"][COLOR="Blue"]Sean B. - Schenectady, NY - 95 YJ, 350/700r4/NP241, JB Shorty SYE, 8.8 rear, 2" BDS, 1" homebrew shackles, Daystar 1" BL, TJ flares, 35x12.50 General Grabber AT2 on 15x10 Bart D-Truckers, Polyshield polycarbonate windshield, HD over/under crossover steering
[/COLOR] [COLOR="Red"]swap/build thread: [url]http://www.jeepforum.com/forum/f22/after-almost-4-years-finally-my-own-build-swap-thread-1542284/[/url][/COLOR][/FONT]