Idler Arm Failure

New part already installed and has 100 miles on it, everything works great. Nothing is wollered. I am going to switch to a different type of chassis lube and see what happens. I am thinking Valvoline VV279, synthetic blend multi-purpose grease with moly. It has a high working temp and is an extreme pressure lubricant.

Do you have a vibration in your front end?
Where did you buy the part? Moog has a lifetime warranty.