Thanks, and apologies for what will be a long winded reply.
Yes, I understand that all cars have issues, but it's surely worth knowing what to look for.
The Jeep autobox is difflocked in low range. Here's what I wrote in a Jeep forum where people were asking about difflock:
"
The reason I'm paranoid about low ratio and wind up is that I have had 2 manual LR110's and an auto Disco 1, and have in the past used them a lot to juggle my boat and other heavy boats into tight spots.
I either used to do this on my own, with the aid of a webcam pointing at the towhitch to a laptop on the passenger seat, or with others milling around very close waiting to wind jockey wheels and hook up.
In both cases, low ratio gave me a much greater feeling of safety and the ability to work precisely in places where there is usually a mixture of uneven grass and tarmac. Proper low-end (ie affordable) boatyards usually have a tractor for this work, but I suppose I have been using even cheaper places.
Currently, because of family pressure, I'm spending a fortune on a marina space and normal ratio is fine on the hard standing there but, when the boat's in the water, I do have to bring the heavy, 4 LandRover wheeled trailer to my son's house where juggling it onto rough ground between trees from a tight driveway involves what my sons refer to as my Austin Powers 30-point turn.
All the tests I've done, mainly in a decrepit local car park, have led to my WJ Quadra-Trak winding up in low ratio, then suddenly a wheel will lose grip with a bang. I'm sure this is fine for green-laning and the snows of America, but I don't want any jerky movements while my son's fingers are anywhere near towbars. I don't think normal caravanners etc would find this a problem.
I and SWMBO do like the Jeep and we are currently using it as the daily drive, but I wish I'd known about how low ratio worked before I bought it."
Re Diesel, I just like diesel. But also the 4 x 4 serves also as backup transport for people we care for. This involves repetitive tiny distances interspersed with long waits. In business I used a petrol auto Omega - 40mpg motorway, but with the OAP's 7 - 9 mpg because it was always "full choke". The Disco1 diesel auto did about 19mpg in the same use. I don't go along with this diesel for high mileages stuff.
This raises the question - Will a 2004/5 L322 have a dpf? I hope not.