If there is vacuum at the large line going to the brake booster. Dose this mean that I need a hole new brake booster or can it be rebuilt?
if you have no brake assess then yes,it needs replaced, cheaper to replace unless you know some one that can do it for you
You should be able to purchase a rebuilt unit, sometimes they make it as the whole assembly, so it will include the master cylinder also.
If your goal is to keep it original A1 Cardone in Philadelphia, Pa. can probably rebuild yours. HTH. - Jim
I kept my old M/C-Booster and bought a new "Dual" system that gives me a better feeling of safety should an old brake line fail. I will still have two wheel brakes. It was about $200 if I remember right. Yes, regardless, buy a rebuilt one and get a guarantee. Good brakes are too important.
Looking for a Used Thunderbird in your area?
CarGurus has 1,133 nationwide Thunderbird listings starting at $5,995.
Search Ford Thunderbird Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Ford Thunderbird Experts