One New Aftermarket Dashboard Tachometer Replacement Fits John Deere 8-Speed Transmission Tractor Models: 820, 830, 1020, 1520, 1530, 2010, 2020, 2030, 2040, 2240, 2440 (S/N 340999-earlier), 2630, 2640 (S/N 340999-earlier) Fits John Deere Industrial / Construction 8-Speed Transmission Models: 300, 300B, 301, 301A, 302, 302A, 400, 401, 401A, 401B, 401C, 401D Technical Information: Housing Diameter: 4 1/8 inch Dashboard hole size should be about 3 7/8″8 speed, 19 mph Replaces parts: AR65445, AL30803, AL19698