Not sure why some would leak and not others. Its clearly something many have experienced because it is on this forum as well as product reviews on the internet. Perhaps whether of not it can vent through the pivot ball in the shifter.
I don’t understand this either and looking at the B&M design up close, I don’t understand how it could be installed and NOT leak. I wasn’t surprised to see mine leak even after reinstalling it 3 times.
Yours looks similar to B&M so I would expect the same issue there as well, and it did happen which I am not surprised about.
