Reply to "Brake Pedal Clunk"

It looks like I was able to isolate the problem and fix it. I could duplicate the clunk by pumping the brake pedal with the car running and in neutral. I got a helper to sit in the car and pump the brakes in the same scenario, and the helper could feel the clunk as well. I next checked around the car while the helper pumped the brakes and I could feel the clunk when I put my hand on the booster and concluded that the adapter shaft and/or plunger shaft might be binding. Upon disassembly of the adapter I found it to be somewhat dry and resistive to sliding, and the flat part of the plunger shaft somewhat dry and gunky. I cleaned everything (again) and this time used engine assembly lube throughout the setup. On the bench the adapter shaft began sliding smoothly unlike before. Everything is back in the car and the clunk is gone.

11/21/202:37 PM

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