By seal I assume that you mean the gasket that goes between the pan and
trans.If you have not piched the gasket when installing, just retighten all
four bolts till they dont tighten any more. Then use 1 hand on the ratchet
and tighten them with your weak hand to get reasonable torque. Also the
collar nut that holds the dip stick tube to the pan may be loose. Use your
cresent wrench here. In the future,you can change your trans fluid at every
oil change by just loosening this collar nut and putting a pan underneith
and then measuring what came out. Remember to retighten the nut.If you ever
over fill the trans, loosen the collar nut again.