I am leaking trans fluid from my radiator connections, when my car is off. I believe it is the upper and lower/in and out connections. I recently lost a lot of trans fluid because my dipstick/filler tube broke where the weld attached to filler tube. Went to check fluid level and pulled the dipstick out and the filler tube slipped out of trans casing, resulting in fluid loss. Upon replacement of fluid, Auto zone gave me DexMerc to use, and I asked them repeatedly if DexMerc was the right fluid type for my car. They guaranteed it was and to my surprise it wasn't. Was told that Dexron 6 is the compatible type after I already used DexMerc (since I can't find Dexron 3 anywhere). Can anyone tell me if fluid type has caused this problem or is it a trans sensor issue or trans filter related problem. Also just replaced radiator with brand new one so I know it's not that cause it was fine before the leak occured. Any insight to what might be causing this issue would greatly be appreciated.
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Hello,
This is a result of the fitting being installed incorrectly.
Your transmission came from the factory with Dex3, so it won't hurt it, but in 2007, GM put out a technical bulletin replacing it with Dex6.
It's not a big deal, next time go back to 6. It does not feel any different to me, either.
