Originally Posted by
markinnaples
I have a 2008 Nav with the old style heads. I was gonna risk doing the spark plugs myself, but decided against it. The dealer charged me around $425 to change them, including a 10% off coupon the sent me. I changed the coil packs myself as they are extremely easy to change (went with the Accel aftermarket coil packs) and the truck is 100% better than it was. Next up is the transmission fluid change. May do that myself as well as I am fairly handy. I'd check around different dealers (Ford and Lincoln) and get the best price.
Mark it's a easy job, I would say check around and find a 6R80 deep pan while you are at it that way you can get one that has a few extra quarts of capacity and also a quick drain plug. This makes changes much easier and you'll not mind doing them every 25K miles.