It's only used in grade braking and If you're heavy footed, you'll never feel it. But, if you have any steep down hills near you get rolling down it and push the brake pedal for a sec and then the exhaust brake kick in. You pretty much tell it what speed you want with the brake pedal on a downhill
Also, doesn't really matter how steep the road is, the exhaust brake will keep you at that speed even pulling a load
Also, doesn't really matter how steep the road is, the exhaust brake will keep you at that speed even pulling a load