I've never had the traxxas one way bearing fail... I wore one out but it wasn't the bearing but rather, the shaft became fluted and caused sticking. They definitely need to be kept clean. Hope this helps: [link=http://www3.towerhobbies.com/cgi-bin/wti0095p?FVPROFIL=&FVSEARCH=one+way+bearing]clicky[/link]