I'm not sure you should usean additive to the trans
oil until the trans is broken in?
I'm running a Steeda Tri Ax, I like it very much. Real easy to change from the top, but I hear pulling the trans cover on an SPF is quite a job. Something about the black goo they use to seal it to floor, nasty stuff.
My understanding on the TKO was that it has larger gears than a T5 or lesser horse power type trans. I would think this would be a factor in that it is going to be a different kind of feel, maybe harder if you would, than a typical five speed?