After a drive put your hand on the wheel, easy way to check for dragging. Either it'll be kind of room temperature, maybe a little warm because you're in texas... or you'll rip your hand away because you're burning the skin off your fingers. The heat from the brakes will transfer into the wheels really easily if they are locked up. Just an easy place to start. Also drive through a tunnel of some sort at low speed with the windows down, you can hear the brakes dragging as you go along. It'll be a metallic scraping noise.