Anyone have trouble with aftermarket rear trans seal?

[Ertech]

Hi guys
anyome have trouble with aftermarket trans output seal ? I am at my 2nd that leaks
I just ordered an original one
the yoke is good I put sealant on spindle and lock tire on nut.
thanks

[Dave @nz]

I think there is a breather on top of the gearbox at the back, might want to make sure that is not blocked off otherwise there should not be any problems with the seal.