Gear (4th & 8th)
CTPA-T21977 Replacement Part to Fit:  John Deere For Models: 1520, 1530, 2020, 2030, 2040, 2240, 2440, 820, 830, (2155, 2355 ALL SN <756483) 20 / 27 Tooth, 4.075" O.D., 1.875" I.D.  Price:  $138.81  Buyers Club Price:  $124.93