1993 ford ranger xlt supercab

wondering if anyone else has had a problem with their automatic transmission leaking out of the front seal area of the tranny, only seems that it leaks when the weather gets real hot! Had the tranny rebuilt and it did the same , dumped fluid out!! WAS INTERESTED IF ANYONE NEW WHAT WAS GOING ON,besides knowing it is building up pressure and pushing fluid out,MUST BE A LOGICAL REASON FOR THIS, BUT REMEMBER IT DID THE SAME AFTER TRANNY WAS REBUILT!! NEED HELP IN SAND-TOWN!

the front and rear seals are sensitive and can tear easilly.any small bur or a piece of dirt will tear it.