This is a A-R43016 Pinion Shaft, 13 Teeth PN: R43016Main Description As Following : A-R43016 Pinion Shaft, 13 Teeth P.N: R43016 Dim A (1): 13 TeethDim B (2): 22 SplineDim C (3): 10.730" Long Replaces: R113732 JOHN DEERE , Crossed From: AMR113732 , , WN-R43016 , , WNR43016 , Found in Section & Models : Transmission & Rear Axle > Diff Planetary Carriers and Related Parts, John Deere TRACTOR: 4520, John Deere TRACTOR: 4620, John Deere TRACTOR: 4630 (SN <-12839), John Deere TRACTOR: 7020 (REAR AXLE ONLY), John Deere TRACTOR: 7520 (REAR AXLE ONLY) Associated Items : A-R43014, A-R48864 Also A-JD-O-OMR46935, A-SMJD203, A-JD-O-OMR48272, A-JD-P-PC1229, A-JD-S-TM1030, A-SMJD203, A-FRM-JD, A-JD-O-OMR65495, A-JD-P-PC1296, A-JD-S-TM1172, A-SMJD50, A-JD-O-OMR51902, A-JD-S-TM1053 And : Length: 10.730" Spline: 22 Teeth: 13