One New Aftermarket Replacement PTO Housing Gasket Fits Ford/New Holland Tractor models: Fits Ford Industrial Tractor: 333, 334, 335, 345C, 345D, 420, 445A, 445C, 445D, 531, 532, 535, 540, 540A, 540B, 545, 545A, 545C, 545D Fits Ford Tractor: 1801, 2000, 2031, 2100, 2110, 2111, 2120, 2150, 2300, 2310, 2600, 2610, 2810, 2910, 2N, 3000, 3055, 3100, 3110, 3120, 3150, 3190, 3230, 3300, 3310, 3330, 3400, 3500, 3550, 3600, 3600N, 3610, 3900, 3910, 3930, 4000, 4030, 4031, 4040, 4100, 4110, 4120, 4130, 4140, 4200, 4330, 4340, 4400, 4410, 4500, 4600, 4600SU, 610, 4610SU, 4630, 4830, 501, 5030, 600, 6000, 601, 620, 630, 640, 650, 660, 700, 701, 740, 800, 801, 820, 840, 850, 860, 861, 8N, 900, 901, 950, 960, 9N, NAA/Jubilee, NAB Fits Ford Tractor Loader Backhoe: 550, 555, 555