[tubman]

There is a thread around somewhere that shows the defective wheel cylinders. Since yours are almost new, it might be worth while to disassemble one and check it if we can find that thread.

My personal opinion is that $15 cylinders purchased locally (from a place like NAPA) have a better chance of being correct than a set from one of the commercial Ford parts dealers who have them made in China and then charge a premium price.