Yes I checked the fluid level it was a little low but it did read on the stick so for good measure I put a qt. In and there was no difference. My only thought was that if it is the nut on the tail shaft that I would think it would not lock in park but mine locks very solid we even rolled it a little and I put it in park and it stopped the car abruptly. The way I understand is there is a nut on the inside of the output shaft which is hard to get at and there is one on the outside of the shaft where it connects to the flange whkch is the easier one to get at and could be the problem as in greazzers case. I dont know where the other nut that keeps the bands tight is at but I will get under there and take a very close look. If the nut did loosen up I hope the splines didnt get ruined. The car is on a trailer right now with the middle cut out only metal where the wheels go so that might give me some good clearance under there that I wont have to jack and block it up.