IIRC, the additional 7th cars inserted into all of the 96 stock were unpowered, having concrete blocks in lieu of traction motors so the weight and suspension settings remained the same. I always assumed that the new complete trains used the same "obsolete" traction motors, for the sake of commonality.

I'm sure that I read somewhere recently that LU was looking to retraction the 95 and/or 96 fleets.