Jayco Granite Ridge / 31SS brake dragging problems...

[cb1000rider]

2005 Jayco Granite Ridge on a 2004 Ford E450 chassis.
About 2 months ago, we went on a small trip locally. About 20 miles in, I could smell burning brake pad. Stopped the RV, found that the right front caliper was stuck and smoking up the pad. Pulled the wheel, freed the caliper and limped home.

That night, I replaced both calipers with replacements from AutoZone. I believe the brand of calipers was "A1CarDone". Replaced the pads and brake fluid also. That seemed to resolve it.

Since, I've noticed that both front calipers drag more than I'd like. Particularly after some hilly driving, I pull into the driveway and the RV definitely won't "roll" and is under light braking. I had it looked at by NTB when I had tires replaced, they had to put a bar on it to turn the front rotors... They opened the bleed valve - no fluid came out (so we know it isn't the lines). They said it was "fine" and would free up on the road.

Apparently Ford put Phenolic pistons in these brake calipers, which are composite / plastic pistons. Apparently they're designed to help reduce heat transfer to the fluid, but seem to be known to get sticky when hot.

I think my two options are:
1) Take it to Ford, which is going to cost some money and will be back to original equipment calipers.
2) Replace the front brake calipers again - with something that has steel pistons (Centric calipers).


Suggestions? Same experiences?