Trac control is off by default in low range, not in 4x4 High. As stated you can hold the button in to override it...or can you? It doesn't work in mine. I can hold it in until the cows come and that damned light won't flash.
Several people say that on their Expys they can hold the trac button in till it flashes and then have complete freedom in terms of tire spin. Mine does NOT. It will still slip the tires briefly then cuts power until traction is regained. This is regardless of where the T case selection is. 2H, 4H, 4A...that doesn't matter. Any ideas? LOL
It's more of a "why is it like this" thing, rather than a blinding need to spin my back tires bald. (i need them whole actually, until I decide on a new set of wheels and tires..)
On my 06 Explorer it works though, and with the brown wire mod (more on that in a few) I can absolutely shred the back tires with trac control overridden.
(*brown wire mod; it's a wire on the pass side dash, behind the glove box inside a connector. One can clip this wire and then put a switch in it for manual off or on. It' just disables the x case's front shaft output, bear in mind that the front axles and driveshaft still rotate with the tires...the hubs are still locked. It's mechanically similar to driving around with your manual hubs locked in but case in 2H, only without the binding of course 3/4 or full lock turns. I've done this to my 4.6 Explorer and has been like this for going on a year with no ill effects. I'd dare say the Expedition's T case is very similar if not the same, and these have the knob that of course can be switched from 2H, 4A, 4H, and 4L.)
