My truck has the regeneration system on it. It took Mack approx two and a half months to figure this system out so it run with out any problems. They had to write a new program for it. I've run the truck for a year now with no problems. It's just like the older models, I never have to do a thing to it.

pretty much the same deal with the one re-gen Mack in our fleet, about a dozen trips to the dealer later, and everything seems to have been sorted out with it.

About six months for mine. Seems to be running good now. A couple of tanks of fuel burned at mack,and a bunch of jobs missed,and a lot of people talking about whether your pump will finish the day with out a problem!:( The price you spend, is not the price it costs!