Originally Posted by bubbles
There are towns that post "NO EXHAUST BRAKES ALLOWED". Maybe that's why can be disengaged. Small towns will ticket if not allowed.
Our little diesel trucks have a relatively quiet, exhaust brake, which isn't restricted by these postings. It restricts large rigs with the very loud "Jake brake".
I keep my exhaust brake on all the time, every time I am on the road, hauling or not... saves on brakes with no ill effect. I use towhaul anytime I am towing. I have to manually select each time the key is turned off.
On my 2012 Ram CTD, towhaul is on the stick, while exhaust brake is a button near center of the dash.