My 56 TBird has a brake booster on it that does not seem to be boosting . I tried to replace the check valve on vacuum inlet fitting at booster but the one sent me from TBird part suppliers is a smaller diameter valve than on my booster. Mine says Midland on booster but mine has a +- 5/8 inlet threaded inlet for check valve versus 56 Parts stores send me one for a +- 1/2. Any ideas what my unit is from- assuming replacement unit ?? Also could my problem be the master cyl on firewall? I’m replacing all rubber hoses with new and replacing rubber hose line with steel line from master cylinder to power booster. I don’t see any leakage but stiff brake pressure needed. Sometimes brakes drag and brake light stays on intermittently .
Ideas?
Brake booster
Moderator: Joe Johnston
Re: Brake booster
Have you considered adapters?