Ford offers a clutch style limited slip the part number is m4204 b it is made by Dana Spicer it's called a trak lok you can also buy it at drivetrain specialist in Warren Michigan this is just recently came out
I believe you have to hold the button down for a few seconds and then put the window back up and hold the switch for a few seconds to reset the limit on it
I'm a retired Ford Tech and years ago Ford had a Teflon grease for drive shaft slip Yokes I don't know if they still make it but that would probably hold up better than anything and also the drive shaft is Powertrain I believe which would be 5/60 powertrain warranty
Drove mine 37,000 miles before my first stone chip took it into the glass shop to have the stone ship repaired and he cracked my windshield had it replaced with a Bronco replacement windshield guess I've been very lucky
I bought a base Bronco I found 18 inch Ranger Wheels on Ebay and I put on 255 70 18s which are the standard size for the Outer Banks I believe they are 32s and I have no clearance issues with them they had the stock offset of plus 55 mm