I drop and replace the filter and oil in the ****** every 30k but I dont believe my OM calls for it till 60k.
It calls for the spark plugs and transfer case every 30k and the front and rear diffs every 15k. Although I personally believe if you change the diffs at 15k to get the break in metals out and off the magnet and do not offroad or tow much, then it should be ok to do those every 30k.
Wouldnt be a bad idea to go ahead and drain the antifreeze and replace that along with the radiator hoses, t-stat, and engine belt. Ill probably do all of that at 60k. Ill probably do the power steering fluid at 30k and 60k also.
Ohh, and dont ask tjkj what he thinks about all of that, he changes all of that every 10k miles.