Upgrade your FOR GM transmission with this comprehensive Bearing & Seal Rebuilding Kit designed specifically for M20, M21, and M22 transmissions from 1966-1974. This complete kit includes everything you need for a thorough rebuild: a 1-inch pin, bushing, keys, springs, and a detailed small parts package. Each component is precisely engineered to meet original specifications, ensuring proper fit and reliable performance. Perfect for automotive enthusiasts and professional mechanics alike, this BK-116WS kit provides all the essential components to restore your transmission's smooth operation. Whether you're performing routine maintenance or a complete overhaul, this new, factory-fresh kit delivers the quality parts needed to get your classic vehicle's transmission back in top working order.