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 04-21-2023, 06:27 AM | #1 |
NordSailOne Member
Join Date: Sep 2018 Location: Livingston, TX Posts: 95 | DT-12 transmission Did your DT-12 transmission come with 3 Driving Modes, Automatic Economy, Automatic Performance and Manual? The manual spells out how to change between the three. I only have Automatic Performance and Manual available, no Economy! Renegade and Freightliner seem to indicate what I have is normal and if I want Economy mode I can pay to have it flashed onto the ECU. __________________ |
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| 04-21-2023, 10:35 AM | #2 |
Uncle_Mike Senior Member
Join Date: Dec 2019 Posts: 177 | that's weird. it was my understanding that Economy and Manual modes are standard and Performance was optional. I know I specifically asked to include Performance mode and it was a separate line item on the chassis order. Some fleet buyers omit Performance mode because they want their drivers to drive as efficiently as possible. It might be worth getting a second opinion. I've seen some FTL dealers who weren't particularly knowledgeable about the software side of things... __________________ |
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| 04-21-2023, 07:23 PM | #3 |
fountainhead Member
Join Date: Jan 2018 Posts: 41 | Mine is the same no economy mode available. |
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| 04-21-2023, 08:11 PM | #4 |
NordSailOne Member
Join Date: Sep 2018 Location: Livingston, TX Posts: 95 | That is weird, I was expecting to have economy and performance modes available, based on my reading of the manual prior to delivery. __________________ |
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| 04-23-2023, 06:07 PM | #5 |
fountainhead Member
Join Date: Jan 2018 Posts: 41 | I’ve got a little over 13000 miles now and there’s been no change in mileage so far. Is the 7.5 towing? Without towing anything (not even a toad) I can get 9+ at 65mph. I’m almost always towing a large enclosed, though, and I tend to drive 75+. I’ve been getting around 7-7.5 mpg traveling between the southeast and out west. |
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| 04-23-2023, 07:09 PM | #6 |
NordSailOne Member
Join Date: Sep 2018 Location: Livingston, TX Posts: 95 | Flat towing F-150 from Katy TX to Auburn AL 65mph averaging 7.5mpg. Was thinking would get about 9mpg, it is what it is, not worried about it. __________________ |
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| 04-24-2023, 12:00 PM | #7 |
fountainhead Member
Join Date: Jan 2018 Posts: 41 | Interested to hear how the economy mode works out for you. Maybe it’ll shift more smoothly. How out of alignment is your rig? Does it pull much? Also, what shocks are you switching to? |
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| 04-24-2023, 01:34 PM | #8 |
Uncle_Mike Senior Member
Join Date: Dec 2019 Posts: 177 | Quote: Originally Posted by fountainhead Interested to hear how the economy mode works out for you. Maybe itll shift more smoothly. The only real difference between E and P modes is when it shifts. E shifts sooner as RPMs increase, and P later. But by 45 mph or so, we're usually in 12th gear anyway, so the shift program no longer matters. It's only when running through the gears around town or accelerating that you notice the timing difference. __________________ |
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| 04-24-2023, 09:52 PM | #9 |
NordSailOne Member
Join Date: Sep 2018 Location: Livingston, TX Posts: 95 | Quote: Originally Posted by fountainhead Interested to hear how the economy mode works out for you. Maybe itll shift more smoothly. How out of alignment is your rig? Does it pull much? Also, what shocks are you switching to? I will let you know after I have it installed. I have to hold the steering wheel to the left all the time, as soon as I let go it pulls severely to the right. It makes it very tiring. I lost my left arm in an accident just over a year ago so I cannot alternate between hands holding the steering wheel. I have asked for Koni shocks from the dealership but I am waiting to hear back from HD shocks to see it they have a shock that fits. __________________ |
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| 04-24-2023, 10:02 PM | #10 |
NordSailOne Member
Join Date: Sep 2018 Location: Livingston, TX Posts: 95 | Quote: Originally Posted by Uncle_Mike The only real difference between E and P modes is when it shifts. E shifts sooner as RPMs increase, and P later. But by 45 mph or so, we're usually in 12th gear anyway, so the shift program no longer matters. It's only when running through the gears around town or accelerating that you notice the timing difference. Mike, agree with you on that. __________________ |
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| 04-25-2023, 06:18 PM | #11 |
fountainhead Member
Join Date: Jan 2018 Posts: 41 | eCoast definitely works on mine with no economy setting. Odd. |
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| 04-25-2023, 07:09 PM | #12 |
NordSailOne Member
Join Date: Sep 2018 Location: Livingston, TX Posts: 95 | That is odd, I cannot get eCoast to engage on slider control, read somewhere online that it only works on Economy mode. Will get it figured out soon. __________________ |
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| 04-25-2023, 07:12 PM | #13 |
Uncle_Mike Senior Member
Join Date: Dec 2019 Posts: 177 | Quote: Originally Posted by fountainhead eCoast definitely works on mine with no economy setting. Odd. eCoast isn't dependent on E or P mode on mine - it always kicks in when the road map is in memory. I searched my FTL manuals and couldn't find any mention of eCoast being unavailable in P mode. __________________ |
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| 04-25-2023, 07:17 PM | #14 |
Uncle_Mike Senior Member
Join Date: Dec 2019 Posts: 177 | Quote: Originally Posted by NordSailOne That is odd, I cannot get eCoast to engage on slider control, read somewhere online that it only works on Economy mode. Will get it figured out soon. What do you mean by "slider control"? I don't do anything to force eCoast to engage. If you're on a mapped road and a few other conditions are met (like foot off the accelerator pedal, etc), then eCoast engages automatically. I can force it out of eCoast easily enough (step on the gas) but i don't think you can force it into eCoast mode by any dash controls... __________________ |
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