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The Ford F-150 offers various axle options with different gear ratios to suit your needs. Opting for a different gear ratio at the rear axle can enhance your performance on the road, off-road, or when towing. For example, if your axle is labeled with a code of 27, it means your rear differential has a gear ratio of 3.31. This type of differential, known as an open differential, lacks a locker, allowing power to take the path of least resistance, driving one wheel at a time. While this setup can improve on-road performance, it may not be as effective in getting you out of challenging off-road situations.
The Ford f150 axle code 27 corresponds to a 3.31 ratio Conventional Differential.