I have dual 8.2 Mercruisers with Hurth 630v transmissions. I just got the boat a few weeks ago and last week all of a sudden both transmissions started acting up. Both the starboard and port emit a high pitched squeal when I go into gear (both forward and reverse) it is more pronounced on the starboard side than the port. The first thing I checked was the fuid levels and found that the previous owner had over filled them by 64oz a side! I drained them down to regular levels but the squeal still persists. It's WAY worse on the starboard side than the port. Any ideas?
