{"product_id":"8-5-gm-3-90-ring-and-pinion-set","title":"8.5\" GM 3.90 Ring and Pinion Set","description":"The USA Standard Gear ring and pinion set is engineered to meet or exceed OEM specifications for GM 8.5-inch and 8.6-inch axles. Each set undergoes rigorous in-house quality evaluation, including dimensional, material, and fitment testing, to ensure reliability and performance. This specific set provides a 3.90 gear ratio, ideal for applications seeking improved torque or towing capabilities, and features an 8.50-inch ring gear diameter with a 30-spline pinion and 10 ring gear bolts.\n\nThis ring and pinion gear set is compatible with a variety of GM models. While specific year and trim fitment can vary, it is generally designed for GM 8.5-inch and 8.6-inch axles. It is important to verify fitment for your specific vehicle, as some sources indicate compatibility with 1973-1975 Buick Apollo and 1971-1989 models, and also lists fitment for 1999–2017 Chevrolet Silverado 1500 models.\n\nUSA Standard Gear offers a 1-year warranty against manufacturer defects, providing confidence in your installation and long-term use.","brand":"USA Standard Gear","offers":[{"title":"Default Title","offer_id":52870581813560,"sku":"ZG GM8.5-390","price":302.89,"currency_code":"USD","in_stock":true}],"url":"https:\/\/store.motormia.co\/products\/8-5-gm-3-90-ring-and-pinion-set","provider":"MOTORMIA","version":"1.0","type":"link"}