thanks guys for all yalls input, i already have a cv drive shaft on there now, im just gonna swap to a tj or 96+ xj shaft and install that seal mentioned and say good by to the vac disco. would yall grab one out of jy or new? if new where is a reputable place to get one from? figure if i go to jy i mine as well pull both sides to upgrade to bigger joints. just out of curiosity, why did they even use the vac disco system to begin with if there isn't much noticeable difference between 1 piece shaft and two?