the squeal was caused by the centering ball in the cardan joint on the front driveshaft, the so called 'angry sparrows".
the vibration was caused by one of the u-joints on the rear driveshaft. replaced both u-joints on the rear driveshaft at work today and my jeep is completely vibration free now. i plan on tackling the front driveshaft this weekend at home. bought all 5 u-joints and centering ball rebuild kit at my local parts house for right around $100 bucks.
i posted this update not because anyone gives a crap. i posted because i'm a drunken, vodka swilling buffoon who saved a couple hundred $$ fixing my own jeep thanks to this fine forum. cheers