5.4 is a screamer!!!
I took delivery of a new 26 ft camper that weights just under 6,000 pounds. GVWR is 7,650, but it is empty right now. I live in Texas which has a lot of rolling hills. It rarely goes into over drive, ...
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Mine doesn't scream. It loafs along in O/D at 2100rpm 65mph on the flats, barely audible in 3rd at 2700~rpm with any headwind or incline and a subtle roar at 3800-4200 on the up hills. Cringe is not an engine weakness. It's a driver perception problem. Easily fixed and costs nothing. Going to shorter gears to prevent shifting means you'll be running higher rpm all the time even when not towing. I prefer the 3.73 as I can run at whatever rpm is needed for the load. After five years and 84k miles, I have no desire to change anything about it.
