f150 EQUIPED WITH 4r80 10 SPEED TRANSMISSION. Starting several months ago, the vehicle started experiencing up shifts with hesitation during upshift, typically the mid gears. Starting from a stop, the shift from 1st to 3rd is very harsh and stutters. Condition has progressively gotten worse. While upshifting, I am now experiencing more exaggerated pausing/delays during mid gear upshifts. While entering a freeway, accelerated to merge with traffic and the transmission downshifted and there was an approximately 2 second delay in the shift which caused the vehicle to bog down substantially, nearly causing a following vehicle to impact my vehicle.