Hey Guys, iam needing your help I have this 2015 f250 that iam needing to do a rear axle/diff upgrade to increase carrying capacity. It has the sterling 10.5 full floater in the rear which ford rates as 6100lb. I have enquired with Dana and they do axle rear upgrades for early and later models but to my understanding not for the 11 to 16 year model. Has anyone modified the sterling rear axle/diff in there truck? or know of any aftermarket companies that do this so they can increase carrying capacity. Thanks for your help.