If done right (there are a few options in it you choose from to make it shift like you want) the TF-2 kit the best kit out there, IMO... I've used a couple other kits that shifted super hard into 2nd but both had overlap problems going into 3rd. Overlap will kill a trans. real quick. I have the TF-2 kit in my Cuda and when I had street radials it would squawk pretty good going into 2nd. I have drag radials on it now so it hooks so good it doesn't squawk them anymore but the shift is real firm.