Dustin Miller
Member
I dont know what gears are in it. I guess whatever is stock.
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The 4.6l is already over taxed in the EXPY. The modular V8 makes its best power near the redline and has a flat torque curve. In your case, that is like making a 70 year old man, run a marathon, with 100 pounds on his back. However, it is a truck and should be up to job, if you don't push it. I installed a K&N 0945 air filter in the stock box. I used a Dremel and cut 2-4" square openings in the box(dirty air side). I covered the holes with screen, glued to the box. You can definitely hear the difference. The power and MPG, maybe a very little gain. A co-worker had a fire chief, 2001 Expedition, with the cop tune. He said it felt, like it had extra "get up and go". A tuner will cost over $300. Probably not worth it.
U have a link to the pan u used ?++ on torque, slow, almost hypermiling acceleration.
I added the maghytec trans pan garnering an extra 8 qts of trans fluid to keep it cooler. Also put an inline B&M trans filter in too. Changed fluid and filter every 25K when towing over extended periods of time.
good luck, welcome again, and let us know what you do.