NEW OLD STOCK MADE IN ITALY 3RD Gear Series 3 Suffix D Onwards Part No. FRC8179 Series 3 models gearbox suffix D onwards except V8. Description: Third speed mainshaft gear with 24 teeth. Gear teeth are longer than earlier versin providing greater thrust surface. Approximate dimensions: Gear diameter 75.7mm(3"), overall diameter 84.6mm(3.3"), length 48mm(1.9"), internal diameter 39.7mm(1.56")