Hello everyone my name is chase I bought my first boat about a month ago and it is a 1987 wellcraft 190 with the 165 4 cyl. I had to replace the impeller in the outdrive. I got it switches out put the new impeller in the housing then put everything back together. I had a hard time getting what I believe to be the spline for the transmission to line back up. Once I finally got everything together I tighten all the bolts and replaces the gear oil. This is were my problem started, I started the boat ( yes it was hooked up to water) and let it run for a few minutes then tried to place it in forward and it started grinding then went in and no more grinding. I placed it back in netural and went to place in reverse and it did the same grinding noise. Before I replaced the impeller I never had any problems with shifting in to forward or reverse. What could have I done to make this happen. Any help with this would mean a lot, I am a first time boat owner and I'm trying to learn as I go. Tanks in adavance