Possible clutch damage after towing

[Rock Trol]

Yes, it drives ok on the road without clutch slipping(not heavy trailer or caravan). Even with the van it would go ok when moving forward.
Reversing tend to aggravate the clutch or something and gives out that strange smell, which isn't exactly the clutch burning smell(I"m used to the clutch burning smell)

Sorry mate, I didn't understand that first bit. It's manual locking hub. I can't engage the front wheel drive without moving the hub lock knob to lock position(in the middle of the front wheels), or can I?
Without engaging the hub lock, the front CVs would just spin themselves without spinning wheels, won't they? Correct me if I'm wrong.
It also says in the 4WD engage guide(sticker on the sun visor) that I need to lock the hubs first before switching to 4WD. I've been told not doing so can damage the hub or CVs or something like that. I'm not sure if that's correct.

Hi dom14, I don't think reversing in low range with the hubs unlocked will damage anything. I do it all the time! I doubt there will be any uncontrolled spinning of front diff as the transfer case splits power 50:50 on both ends so if rears aren't spinning it will be constant power to the front. You also won't be revving the guts out of it either.

Do you know what type of flywheel your Patrol has? The symptoms you described sound like a dual mass flywheel that's leaking oil from the buffers onto the clutch. Happened to a friend a few years ago (GU 3.0 litre). No drive and burnt smell yet the engine was fine. If no DMF then maybe the rear oil seal as suggested previously.