Back in 04 when I bought my jeep, I remember thinking, and still do, that about the only thing Chrysler did wrong, was not offering the option of Warn manual locking hubs. Before I bought it, I did a bit of research and found that Warn offered a conversion kit. Cool, when the unit bearings go, I'll convert... Now, Warn quit offering the kit. My question is two fold... How long will those unit bearings last? Does the Mile Marker kit still have the top notch quality that they possessed 30 years ago? Looking forward to all opinions.. Thanks..