[Bigdav160]

The issue is the same with all transfer cases and transmission (FWIW) without a rear pump. If the driveshaft is turning there are (dry) shafts turning inside. They require splash lubrication which occurs when the input shaft is turning.

If the distance is short enough, or the speed low enough, there is a good chance no real damage will occur. I've heard of people overfilling with lubricant to help with the lack of splash lubrication.

If it was mine I would disconnect the rear driveshaft.