Awhile back I posted a thread asking what the little sensor on top of the master cylinder was...everyone told me it was a low fluid warning sensor. Mine was leaking and i had to order it from the local ford dealer..no biggie, it was 27 bucks..well, while waitng for it to come in, i was down at our local firestation helping in a food drive...and that sensor caught my resivoir on fire...lol....luckily the fire station was 2 seconds away..lol...it cost me 106 bucks to replace that sensor, resivoir, and wiring harness...so keep in mind that on these type of trucks, if that sensor is leaking..have the part overnighted..lol