bryanburns

have 04 2500 hd-ho-sixspeed longbed it has 33,ooomi on it .just got done hauling 6000lbs traveltrailer 600mi noticed the motor got louder and seamed to pull stonger the temp went down also.
is this normal.

HighTen

Yes, I'm pretty sure this is normal. I have heard many others on this forum report the same thing. My truck also did this. Also, your fuel economy will probably be better now too!

bryanburns

fuel economy went through the roof 25mpg highway 16mpg towing 6000lbs traveltrailer this truck is a towing monster. got some of my powerchoke buddy"s looking at cumins

tdupuis

The Cummins is the oonly motor I've come across where it's very obvious when the motor is breaking in and has broken in. Even at only 2100 miles I've noticed mileage go up, oil pressure go up, and temps go down.

bryanburns

hey ted have you pulled with it yet

djp9747

I've always been told that diesel engines like to be hot. It allows them to burn the fuel more efficiently. Don't know if there is any truth in that, but it sounds logical.

tdupuis

I towed a total of about 20 miles with it, highway with a 7500 lb trailer or so. Actually noticed a big difference right after that.

Also noticed the oil pressure increase on the drive up from Texas when I bought the truck.

jerry007

I have a 2003 with a 4:10 gear and I towed another truck on a trailer for about 500miles. I got 16.3 miles per gallon! Me and my brother couldn't believe it. The power from the 305/555 is incredible. This is my first Cummins but It hopefully won't be my last.

tdupuis

I dunno about that, I kinda hope it's my last. As in I hope that this truck outlasts me!

I can picture 30 years from now my kids saying to me: "Dad, when are you going to get a new truck?" "When this one breaks." "But it's got 800,000 miles on it!" "It's not broken yet!"

Realistically I'll replace this one when it throws a rod, blows a transmission, or has some other major catastrophe like my last truck did. But when I replace this one it will definitely have to be with another Cummins.