If you've ever dealt with starter problems on your John Deere, you know that grinding sound often points to a worn ring gear. This replacement ring gear fits a massive range of Deere tractors from the classic 20 series all the way up through modern 8000 series models. When your starter pinion and flywheel ring gear don't mesh properly, it's not just annoying - it can leave you stranded with a tractor that won't fire up when you need it most. What You're Getting 129 precisely machined teeth that mesh perfectly with John Deere starter pinions Heat-treated steel construction built to handle thousands of starting cycles Direct replacement design that bolts onto your existing flywheel Quality that matches OEM specifications for proper fit and durability One part covers dozens of tractor models for simplified parts inventory Built for Real Farm Work This ring gear covers an incredible range of John Deere tractors - from the older 3020 and 4020 workhorses through the 6000 and 7000 series field machines, plus the big 8000 series row-crop tractors. Whether you're running a utility tractor for loader work or a high-horsepower machine pulling tillage equipment, this ring gear ensures your starter engages smoothly every time you turn the key. Made to Last Farm equipment starters work harder than most people realize, cycling hundreds of times during busy seasons. This ring gear is heat-treated to resist wear from constant engagement with the starter pinion. The 129-tooth design distributes the load properly, preventing the chipped or worn teeth that cause grinding and hard starting. It's built to handle everything from cold morning starts to frequent cycling during fieldwork. Installation Notes Ring gear replacement requires splitting your tractor to access the flywheel, so it's a job for when you're already doing clutch work or other major repairs. The new ring gear typically shrink-fits onto the flywheel after being heated, so proper shop equipment is essential. If your old ring gear shows wear on just one section, mark your flywheel position before removal - sometimes a partial rotation can extend life until your next major service.