When i put the gear in "1" position and take to 7000rpm, it seems like the fuel cuts off at 5000rpm, and i can't go any higher/faster or accelerate beyond this point in 1st position. However if I put the gear on "D" and drive, everything is ok, just not in the "1" gear. I have an ATX and my engine is practically stock with an intake, fc tb, afx udp thats it. What could be the problem? Is my transmission ****ing up? Thanks, any help is appreciated.