Detroit DD13 vs DD15 for 80,000 lbs: Fuel Economy, Power, and Maintenance Costs
Electric Chicken
Well-Known Member
I like the autos on grades and in traffic.
I hate the autos finessing under a trailer and into a dock.
I hate the autos finessing under a trailer and into a dock.
InTooDeep
Well-Known Member
I did drive a loaner 2016 when my truck was having front end work done it was a bitch backing under a low loaded trailer, the 2019 not so much. The new truck acted much smoother backing that slam dance into the pin didn't happen.
Ontario Outlaw
Hozer Witta Hood
Must be niceTo each their own but I have been driving my current newish truck for 200k miles and have had little problems with it. Hell even my cab to trailer elec power cord still is working.
Prink
Auto is fine getting under a trailer if you have an air dump like all trucks should.
New autos supposedly have some progrmamming to assist with backing as well.
Electric Chicken
Well-Known Member
Not that. The throttle tip in. All or nothing. They aren't smooth to engage, at least on Schneider's super duper fuel economy above all else programming. They go to neutral at every opportunity.
One second you're sitting there in reverse but neutral. A little throttle does nothing then BAM! you're nailing the pin.
ironpony
Professional Pot-Stirrer
Schneider bought the cheapest version they could get away with.
Programming to assist backing? Nah!! Next thing ya know, they'll want seats that don't give them permanent spinal damage!
Rigjockey
In Gord we trust!
One old School trucker used to come into the plant and he was bitching about the clutch needing to be rebuilt on his automatic. Buddy used to sit there in a pot hole and because the truck was not moving, he figured he could just let off the brake in gear and everything would be just fine. 
Humble pie
What we have is a failure to communicate.
Why would you go with the DD15? The DD13 will actually put out more torque.70k is the number I was looking at recently. Just looked it up, and it's actually 75K.
404 | Demand Detroit
demanddetroit.com
Basing on efficient long haul, which is why I mentioned minimal idle previously.
Humble pie
What we have is a failure to communicate.
The only reason they still offer the 15 is because people think they need a 15. That is what the dealer told me. The 15 is only rated for 1750@505. The 13 will go 1850@505.I'm on the fence with the two engines, but even the DD13 is 65K
404 | Demand Detroit
Opened that can of worms up quite some time back.
Detroit DD13 vs. DD15: Which Engine Is The Best Overall for operating at 80K Gross or less, and why?
Buried in another thread on the forum, is the potential for a pretty informative discussion, one that may affect the purchasing decision of many current and future truck owners. The question? Which is the better Detroit engine today for a typical 80K or less trucking operation? The DD13 or the...
www.freightrelocators.com
Still undecided
Humble pie
What we have is a failure to communicate.
I don’t know why they still carry it. Get a 13 or a 16. No need for the 15.Opened that can of worms up quite some time back.
Detroit DD13 vs. DD15: Which Engine Is The Best Overall for operating at 80K Gross or less, and why?
Buried in another thread on the forum, is the potential for a pretty informative discussion, one that may affect the purchasing decision of many current and future truck owners. The question? Which is the better Detroit engine today for a typical 80K or less trucking operation? The DD13 or the...
Still undecided
They push the DD13 as a regional operation engine. When I was spec'ing a truck, they pushed hard to sell me on shorter gears if I went with the 13 litre engine, even though they were rated the same. Couldn't get a straight answer as to why when both had an 400/1750 at the time.
Those who are operating the DD13 seem to be very pleased with it, though.
Humble pie
What we have is a failure to communicate.
It’s was mentioned briefly when I ordered mine. The reason I shut it down was resale value. Who is going to buy a heavy haul unit with a 13L motor? I have no doubt that it would do it, but it’d be hell to try an unload later. I mean you are running a 12.7 liter motor, do you have any complaints? The 12.7 470 horse was a good strong engine.
12.7 works great for me. Engines went big to deal with emissions. That’s all been figured out now, so the sizes are coming back down.
BlackBart
Well-Known Member
Had that problem even with little trucks
Fix it again Tony went from the 5.9L cummins to the 6.7 only to make up for the performance losses they knew they get from emisson crap
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