Ya Im just torn between doing the rebuild this front end could use (brakes, ball joints, springs, pivot bushings, shocks and might as well do u-joints and wheel bearings while Im in there, already done tie-rods) vs finding a D60 at the junkyard and swapping it in (post rebuild) rebuilding the D50 would be cheaper but just as much work and would still have the POS TTB axle, if I get a D60 from the junkyard Id go through and replace everything including doing a 35spline axle upgrade and tru-track upgrade which would end up costing more but give me a MUCH better (and more user friendly) axle. Besides if I drill a hole in the bottom of the diff I get my drill and myself all covered in oil (at least lightly)
Oh and to add to the fun based on how long it took to pump out fluid vs refill its got a leak somewhere (twice as long to refill, didnt measure what I took out as drain pan was already partially full and covered) so Ill probbly end up resealing the diff anyways (recently obtained truck, hadnt played with 4X4 yet so hadnt touched the front diff fluid)