Guys i can't figure it out but a day after replacing the serpentine belt to the Goodyear Gatorback, the master cylinder or something is vibrating or making a vibrating sound when inside the cab, at a dead stop. What is it does anyone else know. Thanks


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Aaron 99 F250 PSD CC 212,000miles
Houston

 

Mine makes this noise too. If you press hard on the brakes does the sound go away? It's really annoying and I'm kinda worried if it's something wrong with the brake system, but no codes are tripping (not sure if there are brake codes though?).

Terry

 

I am not an expert, but I think the braking systems are what they called Hydroboost systems utilizing a different system than that of the light duty trucks.

 

Thanks guys i went to my mechanic he said that it is normal. The master cylinder is just gettting full hydraulic pressure. Since on my truck it isn't the "pressurized drum" behind the master cylinder there is nothing the master cylinder and power steering pump are operated together so..... Anyway he also mentioned that the serpentine belt that was on before was slipping so bad, now the Gatorback is not slipping at all and turn the pulley's much faster to where the pressure in brake line and power steering are way better. If that makes any sense!! Thanks

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Aaron 99 F250 PSD CC 212,710 miles
Houston