I have a 97' that is turning over 100,000 basically trouble free miles, pulling boat trailers and 5th wheels about 25,000 of that. I have been doing all the basic maintenace myself, but have had the rear end, transmission fluid/filters changed on frequent intervals and the valves adjusted every 24k. What other maintenance should be done/looked around the magic mark of 100,000? I am planning on having the front wheel bearing repacked soon, but what else? i. e. timing belt, replace hoses/belts, etc. I spend almost half the year living in our 5th wheel and keeping the truck from breaking down in out of the way places is one of my priorities! I plan on driving this truck for at least 3 more years.