Shift kits.. do you really need one????

Gil Younger (Mr Shift of TRansgo) developed the TF shift kit to address 1 design "flaw" and to firm up the shifts, therefore putting less time on the clutches, and also allowed you to defeat a few features like downshifting into first and holding gears. The perceived flaw was the convertor fill circuit (also the drainback his new spool valve retards) and his improvement was firmer shifts and higher line pressure. These may make your trans live longer (debatable, what about the pump?) and allow firmer shifts. Thats about it. I see it more of a crutch for an older trans. A new trans behind a factory 440/hemi did fine.