These are pictures of mine at 800 and 1250 miles,(450 miles since dealer cleaned it). I took it to the dealer at 800 miles for warranty repair. They cleaned it off, drove it a few miles then let it sit overnight. Since it did not leak onto the floor overnight they refused to replace it. They claimed the buildup was simply dust and dirt and not oil. Now I have to wait for a month before the same dealer will even look at it again.
I also have the same situation with my driver side front diff seal. I found lots of info on this forum about this problem and before taking it in to the dealer I checked the vent line and confirmed it was not plugged. First time I took to the dealer they did the same clean, drive, sit overnight routine and ended up doing nothing, claimed it was not leaking. Since then it has been back twice, both times they replaced the seal with the new improved version. Last seal was replaced at 800 miles and I noticed it leaking again at 1100 miles.
The dealer is now telling me that Honda claims this is normal weeping and will no longer replace the seal under warranty. The dealer is also telling me that Honda is refusing to pay them for the second time they replaced the seal.
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