I believe this part is nitrogen filled, (some are a spring now) the power steering pump pushes the piston back and excess pressure is used for stopping. If the pump pressure is not there the nitrogen pressured piston gives you one good stop.
Allen
Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first.
Life was a little easier when I was just a wrench.
