Scotty the big question isnt the 2-3 shift with the Zpack, it is what is the difference with the same exact fresh rebuilt trans and shift kit with OE, THEN torn back apart to put the Zpack in for comparison. With a new trans there is really nothing to compare, it better shift much improved over a worn out trans! With the shift kit and clutch feeds set up right, sorry if I sound like a broken record, the OE cluches work great and I have not seen the need for a anything different clutches but again as I mentioned above you are not comparing apples to apples unless you are only replacing one component and not part of a complete rebuild.