I had my tranny fluid replaced about 2 months ago with Royal Purple and this week I noticed a oil leak coming from the tranny side of the engine. I brought it into the garage and they cleaned the case off (it was covered in oil and road grime). They couldn't tell exactly where the leak was coming from but one of the ideas we tossed around was that the tranny was overfull. The other was one of the seals on the side of the tranny facing the drivers side wheel was shot.

When the drain plug was opened tranny fluid started coming out. It was only room temperature (I could put my finger in the stream of fluid).

Any ideas? Could overfilling the tranny really cause a small leak? Any other suspects for where the leak is coming from?

P.S Trans was totally rebuilt less than 2 years ago

It might cause a leak due to to much pressure inside of the gearbox... But im only guessing with that...

Let the excess out, clean things up, and see what develops. It is possible. When I had three quarts in mine I noticed some slight seepage. It went away when I removed the excess.

If you "fill to spill" with the car level, that is without the front end on ramps, you should be fine on the level.

Originally posted by AliasJerkââ??¢ :

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to much pressure inside of the gearbox

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Is that possible since the transaxle has a vent on it? I would think the excess oil would bleed through there rather then blow out a seal. There would be a lot less resistance to blow out the vent. Just my two cents.