I have been struggling with very rough steering and bumps on my 2010 (non Rubicon) JKU for about 2 years. In the last 18 months I have replaced almost all front steering components; Universal joints, ball joints, springs, shock absorbers, steering rod, steering rack, rod, upper and lower links, all front and rear suspension bushings. Nothing really helps. These ball joints were part of a larger update I made a few days ago. Here's a story about ball joints: About 15 months ago I bought a couple