If you're on the highway and don't like the sound of 4 cylinder mode, bump the + paddle to go into 8th gear manual mode. That locks out 4 cylinder mode which removes the weird drone that's exacerbated in that mode. When just putting around I will also hit my - paddle to keep it in one gear higher since the transmission likes to go into the highest gear possible to save fuel. That removes most of the drone and keeps the engine at the proper rpm. If it still annoys you, then hit the button on the dash as you're just in a funky mood at the moment and nothing, even the intoxicating sound of a 392 V8, can make you happy lol.
If you hit the - paddle, it goes into manual mode and will downshift one gear from what you're currently in. If you hit the + paddle, it goes into manual mode but stays in the current gear.When in manual mode it locks the gear selected on mine, doesnt act the same way say on my powerwagon where manual mode sets the highest gear. So makes it kinda useless unless your going to manual shift all the time to defeat 4cl mode. Are you saying yours behaves different?