Have a modified E350 7.3 Diesel van with lift and 4x4 installed from Advanced 4x4 in Utah. It has 4" exhaust, 4:10 gears and the edge tuner on it. I notice that when I'm towing my 23' camping trailer around 60 MPH the van constantly pops back and forth between OD and 3rd gear. And the odd time out of nowhere when I'm going up an incline the van falls flat on its face and won't accelerate at all. with Wide open throttle it just slows down as I go up the incline. I don't feel any shift points and I don't feel the engine try and compensate. I had a quick look at the settings for my edge towing tune and it looks like they are all set to stock. Is there something I should be adjusting or trying to make it tow nicer? I can take OD off which prevents the constant shifting but then I run around 2400 RPM instead of 1600-1700 RPM, the van doesn't seem to struggle in OD it just keeps jumping back and forth between OD 4th and 3rd.
What setting are you using in your tuner?
THOUGHTS?
What setting are you using in your tuner?
THOUGHTS?