I have a 95 Toyota Avalon with 107,000 miles. I have had the left axle changed. The steering rack was replaced 3 times because the first 2 were still leaking fluids. I had all four struts changed and the wheels rotated. The shaking started after the 2nd steering rack change and it has gotten worse. Whether I am driving at 10 mph or 60, it doesn't matter. If I am driving above 50 mph and I hit the brakes, the car seems to shake a lot more and the car vibrates a lot. Can you let me know what's wrong.