Have just read through this whole thread, really interesting. Has anyone at this stage found a way to override or at least increase the speed at which the suspension will automatically reduce from H setting back to N?
There's no way to alter the software to change the transition speeds directly. Indirectly, you can do the sensor lift to raise every position by ~1.25" (30mm). Also indirectly, if you have larger tires, the speedo reads lower by that differerence (~10% for a 35") allowing one to go incremental faster before transitions.
One trick to maintaining a higher ride height to higher speeds is to use low range. In low range, it maintains a 2.5" (60mm) lift to 25mph (40kmh), and 1" (25mm) lift to 50mph (80kmh). Combine that with the sensor lift means 3.75" (95mm) lift to 25 mph and 2.25" (60mm) lift to 50mph. That's already way taller than the LC's run as they don't really lift higher than 3". More like 2" or less with gear and stuff.
Honestly, the fact that it lower at higher speeds is by design, and a good thing. If any of you have driven in "H" mode more aggressively in a parking lot, you'd know the suspension geometry is not stable nor ideal at that height. To be driving over 50mph off-road in terrain, with bad suspension geometries is not a satisfying experience. Also, maintaining some droop travel is really important. So the built in bracket's ability to lift 1.25" really is about the extent I would take it, otherwise driving at higher speeds in "H" mode makes for a terrible handling vehicle. I've done my fair share of bombing down desert washes here in California, chasing Raptors. I've not lifted my AHC at all with the only lift being 1" offered by my larger tires. If there were real obstacles to hit at speed, I would slow way down anyways. AHC does a great job at adjusting damping on the fly to keep things from bottoming out.
I may do the AHC suspension lift one day, but I enjoy good on-road handling and tow performance which I use a greater percentage of time. Heck, it's easy enough to do for off-roading days.
Separately, the 3.15" (80mm) extra high lift of AHC is pretty ridiculous if you think about it. Pair that with the 1.25" (30mm) sensor lift, and that becomes a 4.4" (110mm)!
Extra high, max sensor lift, and 33" tires as I have (1" lift), and that becomes a
5.4" (135mm) lift!$##@
Now if anyone were to ever put this together with a 35" tires, .5" body lift.... 7" (175mm) total lift!