I have a 71 240z with a 280zx engine non turbo 3 speed automatic. So my old flywheel went out and I decided to replace it myself. I ordered a new one off ebay, which is the same as my old bald one. So I dropped the transmission, unbolted the old flywheel put the new one on and theres a gap between the engine block and the flyhweel, which i assume its how its supposed to be. I bolt the flywheel to the torque converter once the tranny is in place. But when I bolt the bell housing bolts in and the transmission crossbracket, the flywheel somehow moves and the gap dissappears completely, so that the flyhweel rubs on the engine block. I have done this procedure many times and get the same result. Does anyone know what im doing wrong?