[MitchF150]

IMO, you should just go to 4.10's if you are considering any kind of gear swap. I suspect your tires are around 32" tall (275/65/18)?? That's just a tad taller then my 265/75/16's..

Where is it that you feel the lack of performance while towing? Is it pulling the grades? Cruising down the hwy? City driving?

Towing is always going to be a series of compromises you have to deal with no matter if it's a little 4 banger towing a utility trailer or an F350 BBD towing a 15,000 Toy Hauler....

I have the 5.4 with 3.55 gears and tow a #5000 TT. I wish it had the 3.73's, but I don't think I'd get any real 'gain' for the $1500+ it would cost to do such a change in my case..

IMO, the 4.10's are going to help you most on your 'city' towing conditions and when going on the on ramps to the hwy. Once you are up to speed, then that's where the compromise comes into play.... You either have to have enough 'power' in your 4.6 to be able to hold OD, or you will still be stuck in third, but now pulling more rpms to cruise at say, 60 mph.. Even on the grades, your 4.6 will need the power to hold third gear longer to make the grade, or you will still be in second, pulling more rpms to maintain your speed...

The only thing me or anyone else can't gauge is YOUR towing performance expectations... While I feel I'm doing fine with my towing setup, you might drive it and think it SUCKS! The only difference there would be our individual performance expectations... I might drive your setup and think it's fine.... It's all in what YOU want your truck to do..

If you 'expect' to be able to keep up with the BBD's (Big, Bad Diesels) on the grades, then stop right now and go out and buy yourself one, because that's the only way you are going to get that kind of performance... No way you can make a 4.6 or even a 5.4 compete with that!

How about this.... When I was a kid back in the '70's, we went camping all the time. We had a 1976, 27' TT and towed it with a 1971 F250 "Camper Special"... We also had a slide in camper (no cab-over part) where my sister and I would ride (we could stand up in it and had 6' bunks on either side and a real "ice box" fridge!). On the grades, Dad had that 390, C6 auto in FIRST gear with his foot to the floor and we were going 25 mph!! And he thought it was fine at the time!! That's what everyone did back then! We were even passing the old station wagons towing the same size TT that were only going 20 mph!

Anyway, I digress, so I guess all of this boils down to is 'where' do you want the see the most performance gain??

Mitch