{"product_id":"richmond-79-0074-1-richmond-pro-gear-79-0074-1-ring-and-pinion-set-4-33-ratio-gm-12-bolt","title":"RICHMOND 79-0074-1 Richmond Pro Gear 79-0074-1 Ring and Pinion Set, 4.33 Ratio, GM 12-Bolt","description":"\u003cp\u003eUpgrade the drivetrain of your GM 12-bolt application with the Richmond Pro Gear 79-0074-1 ring and pinion set. Designed for a 4.33:1 final-drive ratio, this gear set helps deliver stronger low-speed acceleration and improved torque multiplication for performance, off-road, towing, and competition-oriented builds. It is engineered for GM 12-bolt differentials using an 8.875-inch ring gear and a 4-series carrier configuration.\u003cbr\u003eThe Richmond Pro Gear 79-0074-1 includes a 30-spline pinion and is intended to provide dependable power transfer when properly installed and set up. Precise gear matching supports smooth, consistent operation, while the robust construction is suited to demanding driveline environments. This set is a practical choice for builders seeking a performance-focused gear ratio without compromising the established fitment of the GM 12-bolt platform.\u003cbr\u003eBefore ordering, verify axle housing application, carrier series, spline count, gear ratio requirements, and installation specifications. Professional setup is recommended, including correct backlash, gear-pattern inspection, bearing preload, and the use of appropriate differential lubricant. The Richmond part number 79-0074-1 identifies this Pro Gear ring and pinion set and should be used when confirming compatibility with your vehicle or differential build. This product is not air restricted and does not require truck freight.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eBrand: Richmond Pro Gear\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePart Number: 79-0074-1\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eApplication: GM 12-bolt differential\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eRing Gear Size: 8.875-inch\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eGear Ratio: 4.33:1\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePinion Spline Count: 30\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eCarrier Series: 4-series\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eProduct Type: Ring and pinion gear set\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eAir Restricted: No\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eTruck Freight Only: No\u003c\/li\u003e\u003c\/ul\u003e","brand":"RICHMOND","offers":[{"title":"Default Title","offer_id":49199927034078,"sku":"RIC79-0074-1","price":914.58,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0760\/7690\/8766\/files\/RIC79-0074-1.jpg?v=1791829932","url":"https:\/\/www.racingsupply.ca\/products\/richmond-79-0074-1-richmond-pro-gear-79-0074-1-ring-and-pinion-set-4-33-ratio-gm-12-bolt","provider":"Racing Supply Co.","version":"1.0","type":"link"}