first off this forum is awesome lots of good info! 94 scort...99 atx trans...its got bout 50k on it and it sometimes shifts out of overdrive randomly while cruising...and when im on the gas it shifts fairly hard...not really hard but hard enough for me to wonder bout it...when im drivin like a grandpa it shifts great but yeah...looking to do a fluid change before winter...what fluid is best for these things...would a bottle lucas trans tune help me out? valve body sticking? HELP GUYS THANKS!