o6 gt,460 hp at the rear wheels stock auto trans,373 gears.can a tuner change at what speed the trans will shift at at differant throttle positions?by that,at say 1/4 part throttle ,it shifts at 15 mph,then maybe 24 then about 35 to third gear.can it be changed to say 20,35,and 45 to third?can the firmness of the shift be increased also.as it is now leaving from a standing start im into 3rd gear before i can give it full throttle .my lightning shifts alot later in each gear and alot firmer also.i know,differant trans !i just dont like being in 3rd gear gear so quick at such alow speed that when i floor it the car just doesnt move like it should.