CALMINI offers two different versions of a transfer case bearing rebuild kit for the Samurai. This is a great kit for refreshing your case and is used as cheap insurance when upgraded to one of our ROCKCRAWLER gearsets. The full kit replaces all bearings in the case as well as all seals. The retro-fit kit to the Rockcrawler includes all other bearing not replaced in the reduction kit. All bearings must be replaced in the case to keep the warranty valid as a bad or worn bearing can wreak havoc in the case if left unchecked.