Hi all, I'm hoping that someone here can help. We have an Ariens 926500 that we had given to us. It ran fine for a couple years and then it would only run in the 2 highest gears, we didn't get much snow that year so it wasn't a huge deal to run it like that and then it wouldn't go into gear at all. We took a look at it and discovered that the arm that holds the gear shifter in place was loose, the part that holds the friction wheels in place was completely out of it's place. I managed to get that back in and pinned. I discovered that the 3 washers that belong on that part were missing. I replaced those. It ran ok a couple of times and then wouldn't move forward. We took it back apart and replaced the friction wheel. Put it back together. Now the wheels won't grab and move the machine. Up in the air they will spin if the handle is engaged but on the ground they don't propel the machine. I CAN turn the wheels with the handle engaged and I'm not sure that is supposed to happen? We were careful to make sure that the wheel keys were replaced when taking the wheels off and putting back on. Everything is cleaned and re greased correctly. The belts seem fine as well as the cables although the differential? Cable does seem a little slack. Springs and clamps and pins all seem to be where they need to go. What else am I missing?