Diff blowing seals after rebuild

[antonwba]

Hey guys, as the title states I'm having an issue with my rebuilt diff blowing seals. I have driven 4k miles since rebuilding the diff with the Racing Diffs kit. Diff feels good and doesn't have any issues besides the fact that I blew 2 seals already. The first one to go was the pinion seal which I replaced with the updated version from Corteco. Right now I have noticed that my right output seal has started to seep fluid as well. The leak is very slow but it's something I want to address and find the culprit. I've read that Racing Diff's seals aren't the best quality and so far 2 of them have failed to some degree. I have also read that the breather vent could be clogged and causing pressure to build up and blow seals as well. Ive cleaned it with a pin but haven't tried to use compressed air yet. Anything else that I should try or any suggestions would be really appreciated!

[maupineda]

I did not use the RD seals, they looked poorly made and when being pressed the rubber rolled off the steel plate, so I got Corteco ones. that said, I do see how they could fail if the rubber is not properly vulcanized to the metal substrate it will leak for sure.

[1000hp]

Are they in too deep?

They are pretty specific about the depth for the output seals in the manual. And I think the pinion seal needs to be flush.

[bigjae46]

The racing diffs seals go into the trash bin for me. OEM seals. I always use OEM if it is available. The only reason I use anything racing diffs is a lack of availability.

[tr3flip]

The Racing Diffs pinion seal leaked for me too. I just replaced it with an OEM one and so far so good.

[Cubieman]

My E63 M6 was leaking out both output shaft seals after a somewhat long road trip. Diffsonline rebuilt with maybe 2k miles.

I did lower the car to the point the axles are angled slightly upward, but I would think the CV's would take care of that and not mess with the flanges to the point they damage seals.