I had an accident related to the brakes. When I press the brakes air leaks out of the dashboard near the brake valve. It never did that before. When that happens the brakes get sought of sponge and the brakes finally grabbed 2 to 3 seconds later. You feel that temporarily you have no brakes. Another driver drove thus truck and had the same issue. The mechanic said that there is nothing wrong with the brakes. I beg to differ. Does any one in this forum have any imput about this. Help is appreciated. Thanks.