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02-07-2018, 03:11 PM
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#1
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Junior Member
Join Date: Jan 2018
Posts: 3
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2017 Sunseeker/E450
Our Sunseeker 2290s is on a Ford E450 chassis, that has a five-speed auto transmission. Question- is it best to travel in "tow/haul" mode at all times, or just during more challenging situations?
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02-07-2018, 03:36 PM
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#2
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Citrus County, Fl.
Join Date: Apr 2014
Location: Hernando, Fl
Posts: 2,365
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Ford suggests using the tow/haul mode all the time. Do you need to??? No. Unless I am going up and down hills that would cause the transmission to downshift frequently I leave it off and hit the button as needed for assistance in braking. Even though we are based in Florida we do frequent a few places in Georgia and Alabama and Kentucky where it's nice to just leave it in tow/haul.
It will use a bit more fuel because it will always delay the up shifts.
Hope this helps.
__________________
 2016 Forester 3011DS
2017 Toyota Corolla SE toad
PREVIOUS: 2015 Flagstaff 832IKBS
99 Terry 31G
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02-07-2018, 03:48 PM
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#3
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Site Team
Join Date: Oct 2014
Location: North Georgia
Posts: 2,561
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I discussed this with the Ford factory representative at the last Goshen Rally. His advise was the same as what GL1800Rider said...leave it on. While it isn't a official published number he said it would only decrease mileage by maybe one to two tenths of a mile per gallon.
I leave it on all the time based on his suggestion and how it felt, compared to not having it on, in both our E450 and now in our Transit 350HD.
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Wayne
2022 R-Pod RP-192
2021 F-150 4X2 SuperCrew Lariat 502A, 3.5L Powerboost Hybrid, 3.55 gears, 7.2KW Pro Power, 1,840# Cargo, 7,000# Tow
 It is better to have too much truck than to have too much trailer.
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02-07-2018, 03:55 PM
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#4
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Senior Member
Join Date: Oct 2013
Location: New Jersey
Posts: 1,363
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Hudgins if you have a 2017 your rig should have the 6 speed
__________________
2016 Forester GTS 2801QSF 
2011 Jeep JK Toad
Habitual RV Modifier
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02-07-2018, 04:07 PM
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#5
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Senior Member
Join Date: Apr 2017
Posts: 211
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Yup.. it is confusing because it shows D4321 but that is the six-speed. The five would show D321. I never use tow/haul unless in the mountains. It downshifts too much for my liking, but we are in a light coach, under 11K dry.
__________________
2017 Forester 2291S
2015 Honda Accord on Master Tow Dolly
1999 Jeep Cherokee flat tow
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02-07-2018, 04:19 PM
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#6
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Junior Member
Join Date: Jan 2018
Posts: 3
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Thank you all! We've just had it a short time, and the Dealer info listed it with a five speed. Digging through the manual just now, and it is indeed a six speed. Guess I've not counted the shifts!?! I can see why Ford would recommend always using the tow/haul, but agree with the idea of selective use.
Cheers!
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02-07-2018, 04:30 PM
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#7
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Senior Member
Join Date: Jul 2013
Posts: 1,452
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Think about it...your "hauling" ALL the time. Most of the class c rigs are not too far away from their max weight rating, if not over by the time you add all your "stuff". Add a toad, if your towing...
Tow/Haul stays on all the time on our Lexi.
Grumpy
__________________
Steve & Cheryl + Zoey, and Ziggy, our furry kids.
2012 Forrest River Lexington 283ts
Toad, 2013 Subaru XV Crosstrek
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02-07-2018, 04:40 PM
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#8
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Senior Member
Join Date: Apr 2017
Posts: 211
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The shift patterns on the new 6 speed are more aggressive IMHO. Brake pads are cheap.. and my wife hates to hear the engine roar when it forces downshifts.
__________________
2017 Forester 2291S
2015 Honda Accord on Master Tow Dolly
1999 Jeep Cherokee flat tow
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02-07-2018, 06:51 PM
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#9
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Certified Curmudgeon
Join Date: Mar 2013
Location: Here
Posts: 3,656
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My 2014 had the 5 Speed and the shift pressure strategy was ridiculous.
A 5Star tune fixed that.
Now my 2018 has the 6 Speed. It’s better than 5 Speed by a long way however
not as good as a properly calibrated pressures. I’ll be adding the 5 Star soon.
__________________
Welcome to Lake Wobegon where Justin and David utilize abductive reasoning to help solve F/SS issues.
Happy Trails and Remember the Pequod.
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