2015 FLHXS had 25k miles on it, no issues whatsoever. Changed to the new Baker Grudge Box, now the tranny fluid makes it way to the primary in less than 200 miles. Baker said the fix is to use their clutch cover. 400 bones later every thing installed, fluid change both primary and tranny. Within 30 miles I could tell it was migrating over to primary, within a week tranny level at bottom of dipstick, less than 200 miles. Any ideas what could be causing this?

 

Sounds like Baker forgot a Seal when they built it.

 

^^^^
that!