May 26, 201510 yr Hi, My 1990 Legacy automatic transmission has developed a leak. For 15 years I regularly checked the ATF level, then bam, one day it was low. The leak is from a gap cut into the the transmission housing, but is actually the ATF pump. It is leaking about 300mL per hour of idling. At 25 years, a transmission teardown just isn't in the book. But Josh slightly suggested a chemical fix. My question is: which seal is leaking, and what chemical leak solution is most likely to stop the leak?
May 27, 201510 yr Probably the trans front seal which requires the trans to be removed to fix. IMO There are no chemicals that will fix it.
May 27, 201510 yr might be worth TRYING Trans-X, sure, possibilty it will do exactly zip, but others have found to at least help with some internal seals.
May 27, 201510 yr Author Trans-X seems good. I found many happy users. I don't know what causes slipping, or if slipping is a part of leaking, but I just have a leak. Hence, I'm trying to select something that directs all its energy on stopping my leak. The nature of which, btw, I really don't know. Thanks for your help.
May 27, 201510 yr trans-x works supposedly by making seals pliable again. it's getting to be a pretty old car but, maybe a used trans could be found (how new of a trans would bolt-up?) - might have a lot fewer miles than your present trans too. Edited May 27, 201510 yr by 1 Lucky Texan
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