Rob, There is no such thing as a mechanic in a can. If they are leaking, then go to the trouble to take the trans out and replace them. You will be better in the long run. The chemicals will swell the seals, and swell and swell. It's just putting off the inevitable. If you have been around Deloreans long enough to know what gas does to the FP boot , the rubber seals will deterioate into the transmission fluid and start turning it a color . John Hervey www.specialtauto.com/