What is the easiest way to find out what gear ratio you have on a 2015 F150?

 

Crawl under the rear of the truck and look for a tag on the rear differential. Used to be two tags, one that has what oil weight to use and the other has gear ratio and whether or not it has a limited slip differential. Should say like 3 XX after it. If you have the old window tag still, it should be listed on there.

 

Hope this info helps. See attached...


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