So, this has me a bit perplexed. According to the HD Trailer Tow package you get a 3.73 Non-Limited Slip Rear Axle. Does that mean a Timberline with this package will not have a locker, or am I getting myself confused? I've googled every possible combo of search words and only found lots of discussions on how the Expedition diff works - which while useful doesn't really answer my question