driving to work low fluid and brake light. pulled off to 7 -11 checked reservoir almost empty. add 2 bottles of brake fluid drive 20 miles little or no braking, lights on again. stop and refill. drive 1/2 mile to parking lot check all 4 wheels under truck under hood no leaks reservoir half empty. ford dealer 1 mile away. leave truck there drop keys off get a call late that day that master cylinder pumped fluid in to brake booster. they act like its normal say they have to replace master cylinder and booster 1000 plus dollars. ask if they replaced master cylinder with same one no reply at all still waiting. I guess if they say they put a different one on they are admitting it was defective. or if they put the same one on i will sue them when this one goes bad