john and all; back in 72, when they first came out, i replaced the axle brgs. on a 71 hemi gtx with the green full floating style and within 6 mos i had one of them collapse completely. i retrofitted back to stock mopar and havent tried them again since, havent had any trouble since either. i presume its possible that there was just something wrong with the individual brg, or the installation, but i doubt it, i think that the tapered rollers are just a much stronger system, and i intend to stay with them. for what it is worth!!!!! JEFF tucson az.