I have this same issue on my gen 3 liberty, it makes a kind of grinding noise when accelerating or engine braking. The noise gets louder with speed and I also have play in the tripod housing after changing my CV boots. It's not super loud, but it's only been there for 100km so far. I think it might be the bearing, I may have caused undue force on them while taking the driveshafts off and on. Is it possible to fix this without any special tools or is indeed the bearing (which i believe is a transmission out job)?