I'm in a company truck - 2012 International with the IH MaxForce engine. I've had engine brake problems since day 1 in this truck. It's been reprogrammed 3 times, but still the same.
Symptoms:
1 - When you tap the brake, it takes 6-10 seconds before the engine brake engages.
2 - When descending a hill, with the engine brake engaged, once the truck goes faster than 67mph, the engine brake turns itself off. As the truck slows back down (on it's own or by increased pressure on the service brake), when you get below 67mph, the engine brake turns back on.
It's been 2 months since the last reprogramming. Just wondering if they've figured out how to make it stay turned on when you actually need it and for it to turn on before you're already shifting again when coming to a stop.