Bad Brake Booster?

[Mark Brye]

Update - Backdraft parts was able to find me a booster that was pretty close to the one that came on my car. Its an ATE. P/N 3.6130-6500.4. There are other markings under the part number which may be a version number or something. (T51. 161 1 H 5 F ). It has same bolt pattern as my factory unit. It's just under 8 inches diameter. Maybe a 1/4 inches thicker. Everything mounted up fine. This booster required backdraft to have to thread the booster rod all the way down. I had to cut the rod shorter for correct pedal travel. I also had to chase the threads M12-1.75. (I should say that Ray did all the hard work chasing threads and cutting). The booster rod is bigger diameter and has a bigger Clevis pin so you have to drill out pedal arm for bigger Clevis. This requires a right angle drill and stubby bit in the small confines of the foot box. Ray cut down a bit and ground down the bit to fit the drill we had. Only other issue is that the shape of booster is a little different so my older style heat shield does not fit anymore. Will probably try the heat shield on backdraft parts website. I also replaced the gasket between booster and master cylinder. I will post the p/n for that also. I have not driven car yet but am getting close. big thanks to Ray (BlackBB427) and John as always for helping me wrench.