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Old 11-08-2019, 08:04 PM   #1
mre
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Allison Mode Setting

Does anyone use the Allison "Mode" setting? If so, does it make a difference in economy? Just finished the two day Camp Freightliner course and the instructor really promoted it.

I'm sure this has been asked before but I couldn't find any previous posts. If you are aware of any and know their location, please refer me.

Thanks
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Old 11-08-2019, 08:32 PM   #2
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Just my opinion.....the Mode button is a relic from the past. It was designed for coaches of old with 250HP - 300HP engines. It helped those engines hold a gear longer on rolling hills, hopefully helping with better economy.

The more powerful modern engines in the newer coaches, don't need help to hold a gear, they have the horsepower to hold the gearing on rolling hills.

Again, just my opinion. I haven't turned the Mode switch on in years. It's actually detrimental in slow speed situations, as it lugs the engine, especially in traffic and can make for poor acceleration.
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Old 11-08-2019, 08:51 PM   #3
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If you are on gently rolling hills and less then holding it in a upper gear will improve mpg slightly. But as mentioned it does effect acceleration, until you make down shift by stepping harder on the throttle, but anything more than slightly rolling hills don't use it. Even today pickup trucks use different shift algorithms for Tow, Sport and normal. My 2015 F150 stays in gears way to long when driving in normal, drives me crazy its almost lugging. But lower rpms in most cases equal better MPG.
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Old 11-09-2019, 07:16 AM   #4
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If I think of it, which isn't too often, I'll push it when we are in flat country. No noticeable difference in fuel economy, but you do notice negative impact to acceleration.
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Old 11-09-2019, 07:20 AM   #5
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Quote:
Originally Posted by mre View Post
Does anyone use the Allison "Mode" setting? If so, does it make a difference in economy? Just finished the two day Camp Freightliner course and the instructor really promoted it.

I'm sure this has been asked before but I couldn't find any previous posts. If you are aware of any and know their location, please refer me.

Thanks
What did the instructor say about using it besides just promoting it? Did he/she go into details or just kind of mention it was a good idea to use it?
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Old 11-09-2019, 08:16 AM   #6
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This is interesting. My understanding was the Econo Mode was best used in Stop & Go traffic as this mode lowers the shift point RPM. This is the only condition I have used this mode. Sounds like I need to read the Manual....again!
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Old 11-09-2019, 08:16 AM   #7
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Quote:
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What did the instructor say about using it besides just promoting it? Did he/she go into details or just kind of mention it was a good idea to use it?

According to Mike, at Camp Freightliner, the regimen is when in 6th gear switch it on at above 1650 RPM, and switch it off if you fall below 1600, so that you don't lug the engine.


I use it in flat to gently rolling terrain. We have averaged 8 MPG over the last 2 1/2 years and 25,000 miles, which includes this years trip thru northwestern Canada, Alaska, and crossing the Sierras twice on our way back to Florida. We are on the heavy side, at about 42,500 lbs.



I feel like it has improved fuel economy a bit. It certainly has not hurt it. -Paul
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Old 11-09-2019, 11:44 AM   #8
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I tried it for a while. Makes no difference in mpg, so I never use it.
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Old 11-09-2019, 03:51 PM   #9
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Tried using it. Saw no difference in engine performance or mpg. Haven't used it in years and have no plans to use it.
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Old 11-09-2019, 04:20 PM   #10
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I use it if I remember to set it.

Not sure if it makes any difference though. My coach is gas with a 2100 tranmission.
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Old 11-09-2019, 07:43 PM   #11
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Switch modes back and forth all of the time. Generally in E when on the open road, Switch to P when in town traffic, and for climbing grades greater than 4%.
Has helped my overall fuel economy somewhat. To go along with that I am in cruise control unless driving in town traffic or descending a steep grade.
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Old 11-09-2019, 08:41 PM   #12
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Quote:
Originally Posted by PandS View Post
According to Mike, at Camp Freightliner, the regimen is when in 6th gear switch it on at above 1650 RPM, and switch it off if you fall below 1600, so that you don't lug the engine.


I use it in flat to gently rolling terrain. We have averaged 8 MPG over the last 2 1/2 years and 25,000 miles, which includes this years trip thru northwestern Canada, Alaska, and crossing the Sierras twice on our way back to Florida. We are on the heavy side, at about 42,500 lbs.



I feel like it has improved fuel economy a bit. It certainly has not hurt it. -Paul
My coach weighed in at 38,540 last year but we are pulling just over 10,000. I'll have to give it a try. Our overall mpg average last year ended up being 6.5. Thanks for info.
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Old 11-10-2019, 05:56 PM   #13
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My experience with my 3060 tranny in ECON mode is that it slows when the tranny shifts down. So for 1% grades up and down, it might save fuel. I leave mine off.
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Old 11-11-2019, 02:24 PM   #14
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I tried MODE on a 570 mile trip yesterday. There was an improvement in mileage. However I was travelling from Gaffney to Central Florida with a slight breeze from the northwest pushing me. I also had no traffic slowdowns or stop and go on the interstate. Most of the driving was interstate with about 70 miles at 55-65 mph driving on high speed secondary highway. My average was 9.3 using the trip computer. This past summer, I surpassed 10 mpg without MODE across central Canada. There we had a strong wind pushing us. I think to get a real feel for whats going on will take another several thousand miles of driving in MODE.
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