Leaked trans fluid, car stoped, added 6 qts trans fluid, car ran fine for 5 miles, stopped. Could it be a simple seal leak?

What is your question?

Car very reliable prior to this. Car had been parked for a while prior to my purchase. Ran fine for a year.

What makes this problem better or worse?

Adding fluid seems to fix

How long has your 1992 Subaru SVX had this problem?

It,s been parked for 3 years at garage