I'm working on an e-mail to DD to let them know that their current VSS (speed sensor) for the transfer case is an awkward fit.
The hex nut is large and low in towards the end with the gear, and puts it too close to the little bolt that holds it in. Customer installed one just a few days ago and had to punt slightly.
You either have to machine a notch in the new unit (not the best or easiest solution), grind down the bolt a bit (not the most desirable solution), or just grab a properly sized Allen head bolt/cap screw for more clearance.
I have some pics on my other (dead) computer, but you can probably figure it out. If you get a current unit you'll just have to do one of the steps above to get the speed sensor locked down.
Maybe they have another unit that is longer where the hex nut stands off of the transfer case a little further. Or maybe this is the one needed due to lack of clearance in general under a Bronco. Although i think on that latter point, we have a fair amount of clearance in that area around the speedo cable.
Anyway, let you know what they say about it.
But yes, it's got way more functions than most EB owners will ever use. But you'd be surprised at how many of them are getting used more and more these days.