7427 install, first impressions

[1project2many]

I thought the brake switch was just for the TCC?
I disabled DFCO below 20mph, its not really needed at speeds slower than that, and like mentioned above, had very bad parking lot manners. The way I have it set now, it pretty much comes on anytime I let off the gas, and works great! I dont really see the need for the brake switch, unless theres more to it.

GM went to a lot of work to make vehicles coast when you let off the gas. Overrunning clutches in the auto trans allow the engine to idle down without slowing the vehicle down and vehicles with TCC are designed to release the TCC when the throttle is closed. The whole point is to save fuel by allowing you to coast down hills or to ease off the throttle when it's not needed. With your settings there's no way to do this. Brake switch input would allow a way to engage DFCO only when the vehicle is being slowed. And with a manual trans or an auto with the shifter in a lower range, you'd have engine braking to help slow the truck.