Pinion Shaft
CTPA-R43016 Replacement Part to Fit:  John Deere For Models: 4520, 4620, 4630 SN <-12839, (7020, 7520 ALL REAR AXLE ONLY) 13 Tooth, 22 Spline, 10.730" Long  Price:  $191.10  Buyers Club Price:  $171.99