Review on Yukon Gear YSPBJ 001 Joint Differential by Wayde Lash

They looked like quality ball joints. The driver's side upper ball joint failed shortly after installation. The passenger side is junk. I'm pretty sure the bottom ones are gone too. We need to replace all 4 ball joints with high quality ones. They were installed on a 2008 Jeep Wrangler Unlimited. Update - 10/14/2016 - The very first line of the description states that the warranty is 1 year. However, when I went to their website to download the warranty information (because my return window had already expired), they didn't offer any warranty information for the ball joints. In fact, they didn't write anything about ball joints at all!