It appears the flattened-out side of the yoke was cracked for a while before the whole thing came apart. Considering that I've only had this driveshaft for 8 months, it must have been cracked when I got it. And since I have 3 other vehicles to drive, this one hasn't been used every day.

I have no idea where or when the Zerk fell out (assuming it was even installed), but since this failure has nothing to do with grease, it's irrelevant.

Owner caption January 2015 · Photo 0 of 5000