Ring Gear - Flywheel
CTPA-405861R1 Replacement Part to Fit:  Case/IH "For Models: (2400A, 2400B, 2405B, 2410B, 2412B, 3400A, 454, 464 ALL W/ C175 GAS ENGINE), (2500A, 2500B, 2505B, 2510B, 2514B, 574, 674 ALL W/ C200 GAS ENGINE), C-157 GAS" 159 TEETH; 14.69" I.D.; 15.69" O.D.  Price:  $55.30  Buyers Club Price:  $49.77