My truck has a 4l80e, and a few months ago I got bored with it and installed a Transgo HD2.
I bored the sep plate for .086 which is HD shifts.
I like the shifts, they're better than stock, and I've heard that .097 is too firm for a heavy truck.
Now I want to have a custom tune assembled for the truck, but I want to make sure its done right the first time, as shipping anything to Alaska is a pain.
In theory disabling adaptive shift should make it shift more firmly and more consistently.
Has anyone actually tested this, can anyone describe the effect?
I want to decide if it would be better to have the shift times lowered, or disabled.