i dont follow. The brake force is on the strut rod no matter what direction the car is moving. its not like rubber bonded to a shell is not bending/twisting in all sorts of of axis/directions.
The braking force is creating a moment on the LCA. The strut rod alone cannot react a moment, there will be some axial load on the bushing as well. When braking in fwd direction the load will push the bushing against the shoulder of the pin but when braking in reverse the force will move the bushing aft on the pin and there is no shoulder to stop it so the LCA wil move aft. This won't happend with the stock bushing because the busing is bonded on inner and outer sleeves and press fitted in the LCA and on the pins, the rubber is twisting every time the LCA is moving up or down but this allow the bushing to react axial load.
