power brake booster
Thread Starter
Instructor
Joined: Aug 2025
Posts: 181
Likes: 21
From: north central Iowa
power brake booster
I've replaced rotors, brake pads, master cylinder and brake fluid, yet the braking on my 1994 is poor. Hard as I press the pedal, can hardly lock up the tires. The only other thing I think I can do is a new power brake booster. Does anyone have any experience that could give me some advice? What brake booster is best? Is it hard to install? Is there something else I should or could consider?
Last edited by Dougk56; Jan 4, 2026 at 09:25 PM. Reason: more advice
Race Director
Joined: Oct 2008
Posts: 19,187
Likes: 1,670
From: Long Island
I had mine fail on my 85 a few years ago as I was exiting the thruway. . Same thing hard peddle. There was a crack in the case, the 85 was a plastic case.
Since I was 300 miles away, I replaced it with a Auto Zone one. It's been good so far.
Check the vacuum lines before you change out the master. Also make sure you have vacuum at the hose.
Since I was 300 miles away, I replaced it with a Auto Zone one. It's been good so far.
Check the vacuum lines before you change out the master. Also make sure you have vacuum at the hose.
Thread Starter
Instructor
Joined: Aug 2025
Posts: 181
Likes: 21
From: north central Iowa
I had mine fail on my 85 a few years ago as I was exiting the thruway. . Same thing hard peddle. There was a crack in the case, the 85 was a plastic case.
Since I was 300 miles away, I replaced it with a Auto Zone one. It's been good so far.
Check the vacuum lines before you change out the master. Also make sure you have vacuum at the hose.
Since I was 300 miles away, I replaced it with a Auto Zone one. It's been good so far.
Check the vacuum lines before you change out the master. Also make sure you have vacuum at the hose.
Drifting
Joined: Feb 2008
Posts: 1,537
Likes: 177
From: NE Ohio
2024 C4 of the Year Finalist - Unmodified
Had problems with mine too. Turned out to be caliper (front) after I complained to a mechanic of mine for several years. Wheels would not lock uo also. pulled vac lines off booster and no stopping power. Never got out of driveway to test it,
Drifting
Joined: Sep 2022
Posts: 1,466
Likes: 382
From: Liberty, SC
2023 C4 of the Year Finalist - Unmodified
Race Director
Joined: Oct 2008
Posts: 19,187
Likes: 1,670
From: Long Island
Hard to change, no - but a PIA as the bolts are on the firewall.
If I remember correctly you need a long extension and 2 universals. I pulled the drivers seat to make it easier, as I did it at a friends house, with limited tools.
If I remember correctly you need a long extension and 2 universals. I pulled the drivers seat to make it easier, as I did it at a friends house, with limited tools.
Thread Starter
Instructor
Joined: Aug 2025
Posts: 181
Likes: 21
From: north central Iowa
Race Director
Joined: Oct 2008
Posts: 19,187
Likes: 1,670
From: Long Island
it's not difficult , just a PIA.
You don't really have to disconnect much. The rod is held on with a "carter pin clip" , once the under dash panel is removed its right there. unscrew the master from the booster, don't take the brake lines off. Unscrew the booster using long extensions and out it comes. It took about an hour and a half, not rushing and not having a lot of tools.
There are numerous videos on u tube, always watch a few different ones as some are not as good as they should be,
You don't really have to disconnect much. The rod is held on with a "carter pin clip" , once the under dash panel is removed its right there. unscrew the master from the booster, don't take the brake lines off. Unscrew the booster using long extensions and out it comes. It took about an hour and a half, not rushing and not having a lot of tools.
There are numerous videos on u tube, always watch a few different ones as some are not as good as they should be,
Last edited by BLUE1972; Jan 5, 2026 at 01:37 PM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
Thread Starter
Instructor
Joined: Aug 2025
Posts: 181
Likes: 21
From: north central Iowa
it's not difficult , just a PIA.
You don't really have to disconnect much. The rod is held on with a "carter pin clip" , once the under dash panel is removed its right there. unscrew the master from the booster, don't take the brake lines off. Unscrew the booster using long extensions and out it comes. It took about an hour and a half, not rushing and not having a lot of tools.
There are numerous videos on u tube, always watch a few different ones as some are not as good as they should be,
You don't really have to disconnect much. The rod is held on with a "carter pin clip" , once the under dash panel is removed its right there. unscrew the master from the booster, don't take the brake lines off. Unscrew the booster using long extensions and out it comes. It took about an hour and a half, not rushing and not having a lot of tools.
There are numerous videos on u tube, always watch a few different ones as some are not as good as they should be,