motorswap cuts out at 5500rpms and hesitates to shift
 

I put a 96 model motor in my 94 t/a. It runs out strong exept it doesnt want to shift at a high rpm. Its almost like its hitting the rev limiter and the fuel is cut off. I put my old injectors in it today with no change. Is it possible theres is something in the motor swap im missing? IT runs out perfectly while driving normal and doesnt miss at all. any body got an ideas?