i was under mine like 4days ago and i was thinking about that... it looks like on my 3.7 you can get all the bolts with the front pumpkin still there and with a little faness you can get the pan down if not i dont think its that big of a job just to support the pumpkin with a jack and then unbolt it and drop it until you can get the pan out... ill look on my military chiltons manual and see what it sais and let you know
this is what it sais for a 2004 3.9 4wd
Before servicing the vehicle, please familiarize yourself with safety procedures.
Drain the engine oil.
Remove or disconnect the following:
Negative battery cable
Engine oil dipstick
Front axle. Support the engine
Exhaust front pipe
Flywheel access panel, if equipped
Fabricate 4 alignment dowels from 11/2 inch x 1/4 inch bolts. Cut the heads off the bolts and cut a slot into the top of the dowel to allow installation/removal with a screwdriver.
Install or connect the following:
Oil pan. Replace the dowels with bolts and tighten all bolts to 17 ft. lbs. (23 Nm).