Detroit dd15 for heavy haul 3 axles RGN

Hey what ever floats your boat. If the guy wants to haul low bed with his fleet spec Walmart truck fill your boots.
Wouldn't be my first choice thou.

 

6 axle with a light front isn't going to gross much over what. 112?
And not likely to be loaded to the nuts all the time at that.
If you figure an average of 100k or so more often than not then anything on the road ought to get the job done.
Pulling grades on 2 lanes day in and day out, logging roads, swamp hole sites, ECT. Sure more truck would be nice.
But a 18 speed darn sure isn't required.
He's never said where he's from, but that makes a bit of difference. A 3.25 ratio running the south west in the summer is a whole lot different than the upper Midwest.
If anything swap a set of low pro 22's on.
The final gearing can't be that far off from 3.55 on tall 24's
If you built a big heavy haul truck for 6 axles the thing is going to end up so heavy your only hauling a little over 5 axle freight anyway.

 

Rockwell 40-145's Have a Gross Vehicle Weight Rating up to 140k consistantly. Only difference in 13/18 is splitting the low side. If a 13 gets hot on a pull so will a 18. Now I would worry about the doors falling of and water leaking in a crapcadia first.

 

Kinda funny you say that! Lol. Many trucks around here used to Net 150k plus on the 38k SQHDs. Mechanical Cat, Cummins 13 speeds and 4.33 ratio rears. The 3.25ratio would mostly suck. But DD15 is a low rpm engine too. But I agree with you. Over specing is a waste of money.

Now I really dont get why guys think its flat out here? Leave Pittsburgh with 100k on the deck and tell me that its flat.

 

You mean like this guy?

 

Look here’s all I’m saying, if I speced a new truck it would have heavy rears, an 18, decent horsepower, etc etc etc. but some like to pretend that the only thing that’ll hold up grossing over 80,000 is a prime mover. Go to any major metro area and spend a few days looking around. You’ll see small company after small company that has an ex fleet truck pulling heavy loads. The OP like many before him asked a simple question and the simple answer is yes it will. He might get into it and find it’s not for him, then he might get into it and find it is and get a better truck. I just get tired of people acting like it’s that complicated.

 

He’s even got super singles on the trailer.

 

I believe it has been said earlier, but realistically he’s only going to gross around 110 max on six. Maybe 120 in a very few states. It will do it. Will it do it well? Doubtful, but you work with the tools you got.

 

Lighter components will stand up fine on pavement, if you go off road - that’s where the heavy duty drivetrain lasts longer.