This is a A-R80881 Shaft, PTO (1000 RPM) PN: R80881Main Description As Following : A-R80881 Shaft, PTO (1000 RPM) P.N: R80881 Dim A (1): 59.937" longDim B (2): 20(Output)/28 SplinesReplaces: R77766 Replaces: R77766 JOHN DEERE , Crossed From: AMR80881 , , WN-R80881 , , WNR80881 , Found in Section & Models : PTO Parts > PTO and Related Parts, John Deere TRACTOR: 4555 (W/ MFWD W/ PWR SHIFT), John Deere TRACTOR: 4560 (W/ MFWD W/ PWR SHIFT), John Deere TRACTOR: 4650 (W/ MFWD W/ PWR SHIFT), John Deere TRACTOR: 4755 (W/ MFWD W/ PWR SHIFT), John Deere TRACTOR: 4760 (W/ MFWD W/ PWR SHIFT), John Deere TRACTOR: 4850 (W/ MFWD W/ PWR SHIFT), John Deere TRACTOR: 4955 (W/ MFWD W/ PWR SHIFT), John Deere TRACTOR: 4960 (W/ MFWD W/ PWR SHIFT) Associated Items : New Also A-JD-O-OMRW16854, A-JD-O-OMRW16854 And : Length: 59.937" Replaces: R77766 Spline: 20 / 28