From the above article:
And it’s only the rare car company that makes any allowances for dirt roads; most prominently, Land Rover changes their maximum tow weights from 3500kg to just 1000kg when off-road.
No AFM on the HD 6.0’s.
I just changed the exhaust manifold bolts on my L96, two were broken. Replaced them with stainless bolts with nickel anti-seize. Really not a hard job, about an hour for each bank taking my time and having a couple beers. Do you have the exhaust leak yet?
One more reason to get a HD. Really though the only time I've ever used low range was towing heavy up a slow steep hill, or towing heavy over slow rough terrain. I've known 50 plus year old life long "truck guys" who don't know what it's for.
The parking brake on my 2500 only sometimes releases. One of the springs responsible for pulling the shoes back in broke and I haven’t gotten around to fixing it, you have to pull the axle and take off the hub with the full floater I think. Not looking forward to it.
Maybe since truck manufacturers are leaning toward off road specific models they also need to list capacities for both on road and off road. IIRC U.S. military lists their specs for off road, payload and tow capacity.