This is a A-R67199 Pinion Shaft PN: R67199Main Description As Following : A-R67199 Pinion Shaft P.N: R67199 Dim A (1): 14 TeethDim B (2): 18 SplineDim C (3): 10.090" LongReplaces: R57401 Replaces: R57401 JOHN DEERE , Crossed From: AMR67199 , , WN-R67199 , , WNR67199 , Found in Section & Models : Transmission & Rear Axle > Diff Planetary Carriers and Related Parts, John Deere TRACTOR: 8430, John Deere TRACTOR: 8430 Model Year 1974-1981 (FRONT AXLE ONLY), John Deere TRACTOR: 8630 (FRONT AXLE SN <-7842) Associated Items : New Also A-JD-O-OMR65222, A-JD-S-TM1143, A-JD-O-OMR65222, A-JD-S-TM1143 And : Length: 10.090" Replaces: R57401 Spline: 18 Teeth: 14