This is an aftermarket sector plate and pinion gear replacement for MTD and Troy-Bilt riding mower steering systems. These parts work together to transfer steering wheel movement through the steering gear so the front wheels turn properly. Built to match OEM The sector plate and pinion gear are made to match the original steering components in fit, tooth engagement, and function. This replacement set is intended to restore normal steering operation when the original gears are worn, stripped, or loose. Installation Installation is a straightforward replacement job for a DIY mechanic with basic hand tools. Remove the worn steering components, install the replacement sector plate and pinion gear in the same positions, and check nearby bushings, linkages, and fasteners before putting the mower back in service. .product-description-v2 { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; color: #1d1d1d; line-height: 1.55; max-width: 720px; } .product-description-v2 > div { margin-bottom: 18px; } .product-description-v2 h3 { font-size: 16px; font-weight: 700; color: #1d1d1d; margin: 0 0 8px; } .product-description-v2 p { margin: 0; font-size: 15px; } @media (max-width: 768px) { .product-description-v2 { font-size: 15px; } }