Well my motor shaft has bought the farm.
We have come to the conclusion that the coupling was loose because of rust on the inner taper locking piece when we assembled the EV. When we took the transmission out I found the flywheel loose on the shaft!
I tried calling around but I could not find a motor shop to repair it so I am calling up EV suppliers to see who has a Warp 9 in stock. I am going to put a brand new motor in my EV and then I am going to locate a machine shop to turn down the shaft to a slightly smaller diameter, replace the bearings and sand down and repaint the case. I figure the rebuild will be over a few months to find everything so I am buying a new motor so I can get running again. And this time we are getting everything balanced before it does back into the EV.
Oh, and I still need to rebuild the transmission. I have everything to do it except the space, so this weekend is the way overdue cleaning of the workshop.