Andrews Close Ratio 4-Speed Gear Set For Harley Big Twin Features: These gears are made from high-nickel alloy steel, heat treated & shot-peened to give maximum durability & strength Where applicable, drive dogs have milled lead-in ramps to improve shifting & reduce wear These sets include gears, shifter dogs, & shifter forks Mainshaft, countershaft, bushings, bearings, snap rings, gaskets & lock washers must be ordered separately For ease of installation,use transmission rebuild kits 431-595, 431-936, 430-516 or 620-732 2.44:1 first gear / 1.35:1 third gear