The transmission is moving side to side on drive shaft and when it does this I lose power to wheels. I can move the trans just a little to get it to lock in and get power back to wheels but it moves right back over and loses power. I have taken apart and reassembled and all appears to be good internally. My question is, if anybody has experience with this, is what keeps the shaft secured into the transmission? Where the two separate shafts come together to drive the wheels, I cant get that to stay tight and provide continuous power to wheels. I've looked at parts diagram but am not seeing that i am missing any parts. Any help would be appreciated.