just installed the unit on my 5.0L merc and took it for a ride to break it in. it shifts fine and idle is no problem but when cruising at 3500 rpm, it is extremely noisy. Must be gear noise and it get worse at higher rpm. this morning, I checked the oil and it was good and blue and not burned and a little metal shaving at the magnet. took it out again this morning and it sounded better. Is this a problem or expected. I heard the gears are made in china and are not lapped and that is the source of noise.
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very noisy outdrive
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