DD15 from Cat C15

DD15 560 HP does not exist. You may see on label 560HP value but if you connect the diagnostic software you will see it is 505 HP or lower..

 

And the worst part of it is you'll have to post a picture of the new truck you're driving, because I don't think that red Pete has a DD15 engine in it!!!

 

They do have pretty good bottom end torque, not sure how that translates to pulling the heavier loads, but they do pull down pretty well to 1000 rpms.

 

I've never driven anything with a cat, but I drive a Cummins. The dd15 in the freightliners did pretty well going up hills, but the Jakes suck. They don't hold until you get above 2000/2100 rpms, and even then the Cummins can run down hills faster without needing service brakes at the same weight. So it's a tossup.

 

The isx 12 I drove in the oilfields (425/1650) seemed like they would walk all over the 455hp dd15 I'm in now. The jakes on the 09 I'm in suck. The newer dd has better jake especially paired with dt 12 trans

 

Depends on the motor setup.

The 16 FL i drove with DD15 had the best jakes I've ever had. the 13 FL was pretty close.

The 06 C15 i drive now. Don't have much torque and power. And the power range is 1500 to 1800. I can't climb the hills with anything lower.
I think it's only rated for 400 hp. I pull close to 100k and i get my doors blown off by doubles all the time. They pull max weight of 129k.

 

Get one with a DD16, mine has 600 hp at 1,850 torque. You can also get it with 2,050 torque. But the dealer said tires wear down faster due to the excess torque.