First, WELCOME!!!
Just from the pictures, two observations as I think of our 2003 Jayco 31A:
1. Interior pic is all but identical! Same floor plan, cabinets, dinette design, pretty much anything I could see.
2. I like your exterior layout a little better. You have the upgrade mirrors. Ours are the tripod type like most rental trucks. We've had window leaks in the little cabover side windows that your FW doesn't have. And, looks like a deep compartment at the very rear. I'd rather have that, outside, than what not having it allows me to have inside.
What Model Year is the Chassis? Might not be a "2000 Ford" because of the cycle the RV builders buy their chassis on. The "bucking" makes me think it's not flopping back to 3rd gear (direct/High) out of 4th gear (overdrive/OD) when it sees increased load. That's a full 180-degree opposite of what most of these do. They generally downshift when there's enough grunt left to torque over a rise in the road. I ask about Chassis Year because 2000 brought out a different iteration of the V10 than 1997-8-9 had. In any of those years the transmission should be the 4R100,all the way through 2004 or so.
Although I covet your mirrors, that design, from Velvac, is known to break at the pivot on the body end where the arm swings. I figured out how to fix those, so if it happens, get back with us before you spend $200 or so. Some of us fold the mirrors back whenever we're parked someplace that a child might want to swing on them...
Put a Big Red Bow on it under that cover. Then it'll be Christmas all over again when you unwrap it!
If God's Your Co-Pilot Move Over, jd
2003 Jayco Escapade 31A on 2002 Ford E450 V10 4R100 218" WB