Ford F-150 axles come with different gear ratios from the factory depending on the options You choose. The axle will have a code on the differential cover that will let You know what gear ratio You have. The axle code I6 means that You have a 3.73E gear ratio. The E means that it has the electronically controlled locker installed. People choose different axle ratios in trucks depending on what they need them for. Some ratios are better at towing, and some are better at driving on and off road. If You want to know more about what Ford recommends for Your use case I recommend calling a Ford dealership since they will know what gives the best results.
Mark I.
April 13, 2020
The axle code "l6" for a ford f-150 is for a 3.73E rear axle ratio.
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