It has the TF-2 kit. I will pull the pan and rear servo and make sure that the heavier spring is there. And I can drill the piston, too.

Is the #40 drill the largest that should be used or is it a starting point? In order to clean up the 2-3 overlap, I ended up pulling the valve body 3 times. I tried a .010-.015 smaller orifice each time till it cleared up. Could I do the same thing with the rear piston? Start with the #40 drill bit and go up .010 or so at a time till the shift responded?