Question: 1985 Toyota Cressida Mileage: 108,000.&Nbsp;The air conditioning in our car has a small leak.&Nbsp;A year ago we had the seal replaced and added Freon and now is having the problem again. One garage told us we need to have a kit installed to get away from Freon. At the tune of $600.00. The second garage says not to worry about the leak just keep adding Freon. What are we to believe?