Gary
I'll ask our mech where he got it I think it was from one of their regular suppliers. I couldn't find the DD 515 on the Steinbauer site either but that is whats on my box. I'll get all the details and info I can. I believe I'm out of warranty on mine because of age, we have about 55k on coach. The guy that hauls our logs has a 550cat and he uses the Pittsburgh Power module which has 7 settings that really can ramp you up but I think you could hurt your drivetrain with it. He specs his out extra heavy and even with that he typically only puts it on #3 if he has some big hills to pull on a particular job. You should visit their site it has a video of a Newell and you can plug in your engine and it will give you the specs on their product. If nothing its fun to watch the videos :-)
Chris
Chris
2004 Featherlite Vantare H345
H-2 Toad