{"product_id":"3-91-ring-and-pinion-gear-set","title":"3.91 Ring and Pinion Gear Set","description":"The Lingenfelter L380211410 is a premium ring and pinion gear set, manufactured by American Axle to meet OE specifications for Camaro SS differentials from 2010-2015. This set features a 3.91 gear ratio, consisting of an 11-tooth pinion and a 43-tooth ring gear, constructed from a modified SAE 4320 steel alloy.\n\nThe manufacturing process for these gears includes 100% single flank rolling, which is crucial for assuring acceptable NVH characteristics and promoting quiet, factory-like operation of your differential.\n\nWith a 3.91 ratio, this gear set offers a significant increase in effective rear-wheel torque multiplication compared to factory ratios. Manual transmission vehicles will see approximately a 13% increase in torque multiplication and an approximate 180 RPM increase at 60 mph in 6th gear. Automatic transmission vehicles will experience about a 20% increase in torque multiplication and roughly a 300 RPM increase at 60 mph in 6th gear.\n\nImportant fitment and installation notes: Manual transmission vehicles typically do not require ECM calibration changes to correct the speedometer. However, automatic transmission vehicles *will* require ECM calibration changes to ensure the speedometer remains accurate after installation. Professional installation is highly recommended to ensure quiet operation and prevent gear whine.","brand":"Lingenfelter Performance Engineering","offers":[{"title":"Default Title","offer_id":52663550935352,"sku":"L380211410","price":318.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687658212.jpg?v=1784327949","url":"https:\/\/store.motormia.co\/products\/3-91-ring-and-pinion-gear-set","provider":"MOTORMIA","version":"1.0","type":"link"}