[scoutinkeith]

the only advise I can give at this point is to pick up some gear lube, and pull of the dif cover and visuaily(sp) inspect the teeth of the ring and pinion gears.
also, you can try grabing the yoke(where drive shaft attatches to the pinion shaft) and see if there is any play.
also, this is just a thought, but do you know if you have a limited slip dif.? if so, the "grrrrr-rrr" noise could be worn clutches in the dif. if that's the cause, changing the fluid and adding the propper additive may take care of the problem.
also, the 9.25 is a dodge/chrysler axle, they only put dana axles in the 2500 and 3500 moddels.