[GToback]

Joined forum to throw out a critical question.  I have a 2008 39C with CAT C9’s, and Twin Disc 5065 gears.  I bought the boat in 2019 and had the first failure on the port side engine on the way up from Miami right after buying the boat.  We had the transmission rebuilt by Great Lakes Power and ran the boat successfully for about 200 hours before it failed again.  At that point, we decided to replace with a new transmission.  Unimaginably, this past weekend, after another 200 hours, the transmission failed again.  We are just beginning the diagnostics and plan to have a thorough investigation once again.  Has anyone heard of this?  Is the Twin Disc 5065 the common gear paired with the C9 ?  Any insight would be hugely appreciated. Super frustrating and beyond costly.  But I just want to get some answers so we can resolve.  Thank you.