Well, I readjusted the WD hitch today. The dealer had it massively over-distributed. It drove fine yesterday, but you could tell it needed some adjusting. I took it for a loop today and it was much much better. Don't get me wrong, wind and trucks still move things around a bit, but otherwise, everything is fine. I'm used to vehicles moving around under me, and understand how they react, so it is nothing that causes me a bit of concern. You'd feel it even with a 150. I did toss the factory shocks in the bin and am running Bilstein in the rear. With the factory FX4 shocks it would be a nightmare, those things are valved so soft and squishy that you'd have a right to be scared.your 26 looks really similar to the double axle 24 bunk I pulled with the tundra. Of course I want to ask about how the 4T responded under load, but more than that - and you mentioned it, how did the chassis feel with the trailer behind it?
the 10r80, as we know shared with a bunch of ford and Chevy half tons, is certainly up to the task. Did you basically feel like you were driving the turbo once moving on the highway?
I've got to do some more highway driving to get a good feel for it, but I'm not using as much boost at 65-70 mph as you would think. Looks to be in the 3-5 psi range. I did drive a route today with some fairly steep hills just for fun, the 10R80 downshifted and the truck pulled everything up the hill while accelerating to 65 with no problem. On an interstate, even on a grade, I don't think you'd have any problem keeping up with traffic, on a twisty mountain 2 lane, you're going to be a lot slower, so the lower gears help out a lot there.
It looks like at highway speeds I'm going to be getting about 10-12 mpg, which is about what I expected. Can't fight physics.
In tow/haul, the 10R80 doesn't necessarily lock out 9 and 10, but you have to be on pretty flat land at steady speed before it will go into those two gears. Most of the highway work is done by 8th. Can't remember what the engine is turning at 65, my brain is saying somewhere around 2500rpm which would make sense since the torque peak is right around 3k. I'm sure that is probably engine dependant, I'm sure the 2.7 and 3.5's get into 9/10 more often under load.
I was thinking I'd immedately want the Ford Performance tune, which tacks on something like 45hp and 60 lb/ft. I still might do it in the future, but......I'm not in a burning hurry for it. The truck really does run that well with everything stock. Do I think it is better than a 'fullsize' truck. No, that would be silly, bigger truck, more capability. Fuel mileage probably isn't that much better, but. It is easier to drive and park, fits in my garage, and is 'enough' for what I needed/wanted it for.