none in the past year (i've owned the 27 spline long's a little over a year now). b4 that, i broke 2 (stock everything except 5.29's w/lockers and 33" mtr's at the time)--the first one should not have broken in my opinion--granted most of weight was on the side that broke, but was barely moving, wheel straight (didn't have crawler at the time) and was dirt (ohio) w/only 33's--the second one was a no-brainer and i was glad it was a stock one since something else would have broken.....was spinning at redline trying to get up a greasy rock when truck slid and slammed into another rock--something had to give.....
went w/the 27's in case (heaven forbid) bobby ever quits selling the longfields/can't get parts--the stock parts will work w/them if needed + bobby told me the bell themselves are interchangeable if i ever wanted to upgrade (swap out inners and the inner race)