so, i had my boat in the shop after i bought it to have a new impeller and the lower unit sealed before i ever got it on the water. went on the water yesterday for the first time. launched go to put in reverse and while its in reverse there is a constant clicking noise and and reverse not working so i pulled back a little more and it throttled up and clicking gos faster naturally as motor wound up so i put in neutral and just used my trolling motor to back up... FWD gear works perfectly, no clicks and "thuds" into gear as it should... what gets me is reverse works great on muffs..... no clicks, spins like it should..... could it be the clutch dog? cable slack? or could have something happen when the lower unit was dropped in the shop? thank you