Thanks all for the information....I don't think power is going to be an issue especially since we don't go far...the air pressure in tires and bags may be what is throwing things off...we have towed twice...once before the airbags but just 30 minutes away.on highway ..did not seem to be a problem....since then put the air bags and new tires on the truck and the experience was not good..about a two hour drive on highway...you can check the others post I did....this post was strictly to get cummins owners opinions on our set up.. If we can get the towing Experience to a more comfort level perhaps in a couple more years we will be able to get a newer truck...not looking to travel far for the time being but would like the option to do so down the road...