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Transmission fluid leak on 2012 EX-L

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cbailey

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Discussion starter · #1 ·
Hi all-
I was doing an oil change today and looking the mechanicals over for any signs of leaks. In the process I noticed a small amount of grime on the rear underside of the transmission. This prompted me to look higher on the driver's side of the transmission which revealed a more obvious amount of grime, presumably from a leak. This leak must be slow since the fluid level is still high and there are no functional signs anything is wrong with the transmission. Drives just fine but I want to address this if it's likely to become a more significant issue.

Most recent trans fluid change was performed by my mechanic about 20K miles ago but he did not mention anything about this. Might not have been present at that point.

I'm not as mechanically adept as many on this forum and am seeking some input about: 1. how concerning is this to those who are more experienced 2. whether this is common/known issue to this era transmission or a unique issue 3. how expensive an issue this would likely be to address properly

My van has 178,000 miles on it and I've generally maintained it well. It's paid for and I'd like to keep it running well for another year or two before replacing it. But I'm also practical about how much I should invest in resolving an issue like this one, which is why I'm interested in some perspective from those on this forum.

Thanks in advance.

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#2 ·
What I do with a minor leak like that is clean it and keep an eye on it. If you do that a few times, you can track down where it's coming from. You might need carb cleaner and some thick rubber gloves though cause that looks pretty thick and old. Brake cleaner is not as strong (but cheaper).

Once you determine what's leaking and how fast, you can then decide if it's worth fixing.
 
Discussion starter · #5 ·
94eg! said:
What I do with a minor leak like that is clean it and keep an eye on it. If you do that a few times, you can track down where it's coming from. You might need carb cleaner and some thick rubber gloves though cause that looks pretty thick and old. Brake cleaner is not as strong (but cheaper).

Once you determine what's leaking and how fast, you can then decide if it's worth fixing.
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Appreciate the feedback. Sounds like good logic. Will do this as well as the ATP-AT205.
 
Discussion starter · #6 ·
2011.2017.odyssey said:
+1 on cleaning things up to find the source, alternatively you can add some ATP-AT205 to the transmission fluid, its harmless and will rejuvenate rubber seals that lose it plasticizers over time.
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Two follow up questions for you: 1. How much ATP do you recommend adding to the trans fluid? Somewhat concerned about adding a secondary fluid to trans fluid and definitely don't want to create any problems by doing so. 2. Do you think such a leak could be caused by too much trans fluid being added? I had a trans fluid change done last year by my mechanic and the disptick level consistently reads about 3/4" above the second hole when the fluid is cold.

Thanks in advance.
 
#7 ·
My 2012 EXL doesn't like being above the top hole when the fluid is hot. I check about a minute after shutting off the van. If it's over the mark, I get rough downshifts when coming to a stop.

As for the leak, the way it's shown doesn't appear to have anything to do with overfilling. Of it was slinging out from the he axle seals, i might say differently.
 
#8 ·
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