3rd Gen Ram Tech2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
not all that much really. spark plugs, wires, maybe coolant and trans if you are due. check a bunch of stuff. grease ball joints, check belts, hoses, maybe diff and transfer case fluids. don't know what the cost would be, but it will vary with how much you're getting/need done. the plugs and wires alone will run you over a hundred if you got them done somewhere.
just realized i got a coupon from local dealer for spark plugs, I think it was $100 or 109 installed. add on a set of wires (no added labor since they pull them anyway) and I figure $160-180 or so for everything with all mopar stuff. This is the dealer, mind you. It can be done much cheaper if you go to the right place, like your garage, driveway, or street in front of your residence.
I just stumbled upon this site: repairpal.com it seems fairly accurate at estimating repair/maintenance costs
abuddy of mine has an '04 with 90,000 miles on it and he was quoted $600 for all of the above you had mentioned
2" level kit, e-fan, Air raid jr. intake, nerfbars, Diablosport intune i1000(Thanks autoanything.com) ,front tow hooks,billet grill, Gibson shorty headers,led lights,flowmaster duals, Sonnax trans pressure booster.....more too come