Over the Christmas break my son and I decided to tackle the disk brake upgrade on his 69 Gladiator. There’s plenty of tutorials out there so it was an easy job to mount everything up. We didn’t install proportioning valves as it seemed there was no clear consensus on its value.
The truck has a vacuum booster and master cylinder that I bought from j and w several years ago. I thought that it would be a good idea attemp to find a disc brake MC that would fit instead of the stock one that J and W sold me with the booster. I called them and the sold me a MC that would fit the booster and give me a larger front disc reservoir. The booster appeared to be off a early seventies Ford f 250. We matched it up with one from a one that the helpful guys at napa found.
The bore depth and all of the measurements match the original Jeep MC.
We have bled the system several times and very occasionally get a soft pedal. When it works the truck has never stopped better! I asked several mechanic friends who felt that maybe the MC was a bad rebuild so we replaced it. Again we are still getting the soft pedal.
There are no leaks. The rear wheels have been adjusted. One thought is that possibly the booster rod needs adjustment because it holding the plunger slightly open. Or maybe there’s still air in the system. Again I cannot say enough how better the truck stops with the disks.