long story short, my pan is leaking and the shop that fixed it in april won't fix without charging me again as i cannot produce receipt. i somehow disappeared in there computer system, blah, blah, blah. anyway, i will have to take it somewhere else. the original shop used valvoline atf and i was wondering if the next shop does not use this, and uses some other form of atf, will this hurt the tranny?? TIA.