My Freekin Leakin rear Diff....

[ChevyDude]

You guys might remember that my K-10 exploded it's rear end and I had it re-built with a new Eaton Posi and 3.73 Motive Blue Line gears. I thought all was well back there but lately have been noticing a small drip when approaching the truck. My day off was yesterday so I stopped by NAPA and bought a new rear cover gasket, gear oil and posi additive. Removed the cover, cleaned it up, installed the new gasket, and re-installed cover. Tighten all the bolts and filled pumpkin. 10 min. later,,,,Freekin drips!!!! I climb underneath and fine on the back side a small crack about 1/2" long where the leak is coming from. CRAP!!!!! I dabbed a bit of Permatex gasket sealer in the crack and as of this morning no leaks, just not sure how long the Permatex is going to hold up. Question is, should I wire wheel the area and JB Weld (permanant steel glue) the crack, or should I clean it up and touch a MIG to the crack?

Any suggestions would be great.

Alex