The stock breather was simply a small steel tube with a collar to prevent it from falling into the ZF, and a plastic hose pushed on. I have never heard of anyone getting gear lube out of this hose, only hat air as the unit heats up in use, so there is virtually no pressure on the breather. Tapping the case for a bullet-proof fitting can certainly be done, if you are skilled enough to do this without getting any aluminum chips down in the trans to screw up your gear shifting. One chip in a synchro unit can keep that gear from being selected until the trans is disa$$embled and cleaned....
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