[cpmudrunner]

I recently purchased a 2002 ranger 4wd w/ 4.0V6 & auto tranny. when first starting the truck and driving, the brake pedal feels pretty low and response is kind of weak. After driving for about 10 mins, brakes are fine. Dealership tech looked at the problem but determined nothing was wrong. I was ondering if anyone else had a similiar problem. Brakes were replaced and rotors turned on the front, and rears supposedly only "serviced". I thought maybe ajustng up the rears might help but not sure . Any advice? need more info?