Navistar Maxforce7 Diesel

I am considering trading in my 2014 RV in on either a Tiffin Allegro Red 33AA or a Breeze 32BR, to go from gas to diesel. I know the 2011 Tiffin Breeze had front end axel problems that were fixed as I understand it. What about the Breeze and the Navistar Max Force 7 diesel engine? Are there still problems with that engine or have they been fixed? What years of the Breeze should be avoided?

Thanks,
Sgtrock9