about the 1/8 mile it hits third gear and cts like its in neutral. i tries it in "D" and "OD" and it does the same thing. i let off the gas and hit it again and it finally shifts right....tranny was just rebuilt, transgo shift kit, bigger vanes and valve body. i alsohave a 3000 stall convertor.. any ideas?

 

i also dont have the lockup connected i just unplugged/cut wires...do i need the lockup when running a 3000 stall?