Moog quality has suffered over the years.
Use either Spicer, or XRF for best results
Check Spicer's/XRF's web sites out. You'll see the difference in Quality, over Moog.
Just one Man's opinion:
"Personally, I don't even consider MOOG anymore. I've heard of XRF parts and plan on using either them or Spicer next time I need suspension parts. I learned about XRF several years ago, and I believe they even make replacement ball-joints for the failure prone factory ball-joints on military and civilian Humvee/Hummer H1s. From what I've gathered, the XRF parts are the 'real deal.' XRF has a website and it's
www.xrfautoparts.com
One of the most important things I look at when buying ball-joints and tie-rods is the grease boot. I look for joints with attached seals. From what I've researched, the only companies which actually have good seals are Ford, Spicer's premium stuff, and XRF. Don't forget that most aftermarket companies (MOOG) still sell ball-joints with the type of seals which Ford abandoned and even had a TSB about. The seals led to accelerated ball-joint wear and failure, due to their inability to keep the joint protected."
Raybestos Professional Grade stuff is pretty good too.
http://www.raybestoschassis.com/wps...ebsites.content/products/general/ball+joints/