sirhc76

I just had a 93 4l60e rebuilt. I installed it and followed the proper fill procedure. After letting the truck warm up I went to shift the gears and nothing. I then noticed that the manual shaft was spinning 360°. It wasn't doing this before I installed it and it shifted through all gears as it should. Did the nut possibly come off the backside of the shaft, is this normal? Just trying to get an idea before I drop the pan.

Thanks,