Thanks for the reply.
I only drove it the 20 miles to work before deciding to disconnect the hoses just in case. Then I drove it another 20 miles home and at that time found the fluid on the garage floor. It drove fine all 40 miles. I checked the level and when I found it low I took it straight to the dealer. Two days later I realized I may have panicked but they were already looking for a leak by then. After four days of looking I received the call today about the pinhole leak that puddled fluid on top of the casing. It seems strange to me also and I found no acid in the tubing when I disconnected it but do not know if some gas may have travelled into trans but I had the same reasoning as you about which way the pressure would have gone. I OK'd the work to begin this afternoon because I would imagine even further charges if I took the car back and it continued to leak and then I had to return it to them. This info probably doesn't help but I just wondered if it seems at all reasonable that this short trip could cause the case to develop a hole. It seems unlikely that it is coincidental also, but I guess it is possible, but that would indicate a major problem in the actual casing manufacture to me.
