CB's Super Duty Side Plates are designed to keep your ring and pinion gear properly meshed. They are thicker and provide more strength than stock factory side plates. The new design includes a groove to retain the factory O-ring (sold separately) to aid in preventing oil leaks at the location where the axle tube is bolted to the side plate. Manufactured from 613 alloy to provide strength and ductility. Includes clutch cable bracket.

Super Duty Side Plates are also available for '69-'77 IRS Type-1 transmissions, CB# 4560.