I didnt mark the position it was in when I took it off. I heard that there is four different position it can go in so just turn it 90 degrees. I hope that is all that is wrong with it.
Easy fix. Pull the speedo sensor out and find out what gear count the speedo gear is by reading the number stamped on it.
Next, find the number ranges embossed onto the outside of the black part that holds the speedo gear. There will be a number range on 4 sides of the thing.
Insert the speedo gear into the tailshaft housing with the appropriate gear tooth range at the 6 o'clock position, straight down. There should be a little nub on the tailshaft housing to line it up to but it's difficult to see.