Transmission

Hey, well i feel like iv lost power somehow, im thinking its my tranny adjusments. For the kickdown, i can actually feel it on my pedal, its a spot that is hard to push, should that start at the bottom of the pedal or earlier? Truck doesnt seem to be getting enough fuel or something, i used to be able to go to 0-160 kms which is slow now i can barely get going 140 kms, takes forever to climb.