holley 4010 kickdown?

okay. so the ups guy should be here any minute with all of my Lokar stuff. So i'm going to be putting it all on tomorrow afternoon. Since the tranny slips between 2nd and 3rd, could it be just the kickdown? or is it more likely that I'll still have other transmission issues? I haven't driven it in 2 days since i realized how serious of an issue it was.. so hopefully it isn't too far gone.