Enter the VIN on the Workhorse website to see if the brake recall was done. I know it involved W22 chassis and I think the W20. It involved replacing the 4 brake calipers to eliminate the brake problems of hanging up. I have experienced brake problems on both a Ford and WH chassis so it isn't just one maker. Brake fluid will absorb moisture and this is what causes problems in the systems. I flush my brake fluid every 2 years since my '89 Ford had a problem. PM me if you have any questions on that point. You have the best chassis I have ever had in any of my RVs in 44 years of RVing.