Considering I used JB Weld on mine.....I guess how well it works is not known until I get the trans back in the car. I would say it would depend on where you crack is at. If it is at a seal area, then I don't think you would be able to get the seal to adhere correctly. Other it is an external area on the case away from seals, etc. I probably would try draining the atx and cleaning the area, roughing it up a bit and try JB weld. Can't hurt anything on the exterior of the case?
