6 months ago I had a caliper on the front driver side not releasing, replaced caliper end of issue. Same thing happened to the front passenger side a couple days ago, rotor and rim were hot. Replaced caliper and pads on all four wheels. Seemed to resolve. Drove the truck 30 miles today and I get out and there is smoke coming from the rotor. Let cool down a couple hours, drove home, rim was 400 degrees.

While driving home it didnt feel like the caliper or brakes were hanging up, truck didnt pull one way or the other, braking feels great, no noise, nothing.

Any ideas? I guess it could be a bad caliper? Would love some insight!!!

 

Possibly one or more flex hoses coming apart on the inside and restricting fluid return?

 

Thanks Mexstan!! Nailed it!! Ended up being the rubber brake line at the caliper, it went bad, it would allow pressure when braking but would collapse when taking pressure off the brake pedal, so when it would collapse it wouldnt allow the caliper to release. Never seen that before..