i feel real confident, the wcd and a long running start will get you there, even though i have only seen videos of those dunes. instead of saying , suspension, suspension, suspension, we will all be chanting WCD, WCD, WCD!!!
NOW GO RABBIT GO!
i dunno what the machines usually run for speed up china wall, but the WCD on the wildcat will run 45-46mph in low range. put her in low and let it EAT. i know you guys just want it to do it in high range, the vid of that XP running up the hill looked SOOO easy, had to be in low range. a hill that steep, and soft sand, sucks the power out of anything. the XP was likely in low range. i wasnt there, so i cant prove it, and i dont honestly know, but it appeared to be in a range that was lower than high range.
I would disagree with that.... you need speed, not low gearing. take as LONGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG a run as you can and take as much speed into the dune climb as you can.
low gear wouldn't get you half way up.