ok guys i have a quick question?

i have been having this problem with the bolts on my tranny, mostly the one bolt that gos from the block side to the tranny side (the small 12mm bolt).
i keep having a problem with that bolt actually snapping off into the tranny, and then once it snaps it causes all the other bolts to loosen up. and then it causes a really bad noise when the clutch is engaged (witch i know for a fact is no good) but i was talking with a friend and he was saying that i may be making the bolts on the tranny to tight and then i end's up stretching the bolt and causing it to have to much pressure on the bolt itself and making it snap and the the other bolts are also stretched and then once the pressure is released from the one bolt snapping the others start to back out.

so basically my question is has anyone else ever had this problem?
and is there an actual torque spec for the tranny bolts?

thanks