With Expertise Built In , the OTR 6-Spring Automated Manual Transmission Clutch Assembly ensures you are Ready for the Road Ahead with less maintenance and thus having a longer life due to a sealed and permanently oiled release bearing. The cryogenically treated springs serve to eliminate disc spring failures. With advanced ceramic material, this premium OTR spring clutch delivers 10-15% more holding power versus carbotic. This heavy duty spring clutch also boasts clad bushings that are crimped and pressed into the sleeve for extended bushing life for your semi truck. FleetPride is your First Click in Heavy Duty .