Yep it's electronic. Fleet MPG standards pretty much force them to add stuff like that and engine start-stop to have a chance at meeting government requirements. Of course the know-nothing know-it-alls are up in arms about these axles being weak pieces of trash because they have an axle disconnect and the ring gear is a few mm smaller than the D44 they replaced. Nevermind the bigger C's, bigger OD and thickness tubes, etc. They're supposed to be pretty stout but of course the idiots have to bash at every opportunity.
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