So a week ago my boat slid off my trailer and the lower unit took the hit. Small dent on the front side of the lower unit., I had the boat out saturday and in neutral everything sounds fine. When I put it in gear and under load I hear a faint whining sound almost like the sound you would hear when a power steering pump on a car has no fluid. Any idea on what It could be. I checked the gimbal bearing and replaced all bellows last week. Any help would be great. 1997 sea ray 260 7.4 bravo 1