This is a A-RE210074 Trans Disc: 12" PN: RE210074Main Description As Following : A-RE210074 Trans Disc: 12" P.N: RE210074 12" 16 Spline, 1.0625 in. Spline Dia. Transmission Disc for John Deere Tractor Models: 3010, 3020Replaces: AR42125, RE29774Spline Count: 16Spline Diameter: 1.0625" Replaces: AR55661-RO JOHN DEERE , RE210074-RO JOHN DEERE , RE29774 JOHN DEERE , Crossed From: AR42125 JOHN DEERE , R42125 , , R42125 MISCELLANEOUS , SW07553 , , WN-RE210074 , , WNRE210074 , Found in Section & Models : Clutch Parts > Syncro/Quad Range, John Deere TRACTOR: 3010, John Deere TRACTOR: 3020 (S/N 068000>) Associated Items : New Also A-FRM-JD, A-JD-O-OMR32385, A-JD-P-PC736, A-JD-S-SM2038, A-SMJD203, A-FRM-JD, A-JD-O-OMR34406, A-JD-O-OMR41753, A-JD-O-OMR46012, A-JD-O-OMR48271, A-JD-P-PC1115, A-JD-P-PC858, A-JD-S-SM2038, A-JD-S-TM1005, A-SMJD203 And : 12" 16 Spline, 1.0625 in. Spline Dia. Transmission Disc for John Deere Tractor Models: 3010, 3020 Replaces: AR42125, RE29774 Spline Count: 16 Spline Diameter: 1.0625"