hi everyone.i know someone can help me.i got a used transmission and was cleaning it up getting it ready to go it.and i noticed there is a crack in the bell housing right behind where the starter goes next to where the dip stick goes.its maybe 2 inches in lengh.the other line that looks like a crack is there the bell housing is bolted to the transmission.the crack is where the bolt is to connect it to the transmission.here are pics of it

 

It is kind of hard to determine location given the narrow field of view in the photos you provided. Could you post another photo showing more of the underside of the engine/transmission?