Reply
 
Thread Tools Display Modes
Old 09-17-2020, 01:24 PM   #1
Junior Member
 
Join Date: Oct 2019
Posts: 9
Maybe a dumb question?

We have a Salem fsx260rt, weighs in at about 6000#s loaded with a tongue weight of roughly 700#s, pull it with a F-350 srw, 6.2L 10 speed trans. Do I need to shift to tow/haul and halve my fuel economy? Will leaving it it standard drive harm the tranny?
50panhead is offline   Reply With Quote
Old 09-17-2020, 01:26 PM   #2
Senior Member
 
DieselDrax's Avatar
 
Join Date: Feb 2018
Location: Monticello, IL
Posts: 1,692
Tow/Haul just changes shift points, it won't cut your fuel economy in half (Not sure where that idea came from or why). Won't hurt your trans to not use Tow/Haul as long as it doesn't hunt for gears and get the trans hot as a result.
__________________
2017 GMC Canyon - CCLB, 4x4, 2.8L Duramax, ARE Z-series shell
2013 Shamrock 21SS
DieselDrax is online now   Reply With Quote
Old 09-17-2020, 01:28 PM   #3
Senior Member
 
Join Date: May 2018
Posts: 110
You shouldn't cut your fuel mileage in half by using the tow/haul mode. My truck, (not a F-350, but a gas engine) uses maybe 10-15% more fuel (noticed from my hand calculated MPG) when in tow/haul mode, but the benefits of me using that is active grade braking, and a better torque / power cure to keep the engine in the power band.

Use the tow / haul (you're probably right on the edge of actually needing it with your rig and the truck you have) and enjoy the truck for what it's capable of. Who worries about MPH so much when going camping anyway? Unless of course you're going across country.
__________________
Greg, Janelle, Tenley, & Ellis
2019 Palomino Puma QBSS
TV: 2015 Silverado Z71
Other toys: 2007 Rinker Captiva w/Monster tower & rack
GXPWeasel is offline   Reply With Quote
Old 09-17-2020, 01:46 PM   #4
Senior Member
 
JRBME's Avatar
 
Join Date: Jun 2019
Location: Charlotte, NC
Posts: 137
An educated guess would be yes. Use tow mode. The 6.2 has a high RPM peak torque/HP range and both engine and transmission will run cooler in tow mode, even at higher RPM.
When in flatlands, try OD and see how it feels. If boggy feeling and transmission 'hunts' in and out of lockup, use tow mode.
While 6000 lbs isn't a huge load, it is a hefty load for a gas truck. Assuming 4.30:1 rear diff? If some low number ratio like 3.73:1 you'll definitely want to use tow mode when pulling 6k.
6.2 Fords make good HP and torque, but only at higher RPM. Modern engines like a bit more RPM.
YMMV
JRBME is offline   Reply With Quote
Old 09-17-2020, 08:57 PM   #5
Now a "Top Member"
 
EdJunior's Avatar
 
Join Date: Feb 2010
Location: Roman Forest, TX
Posts: 2,600
Quote:
Originally Posted by DieselDrax View Post
Tow/Haul just changes shift points, it won't cut your fuel economy in half (Not sure where that idea came from or why). Won't hurt your trans to not use Tow/Haul as long as it doesn't hunt for gears and get the trans hot as a result.
This! Says it all.
__________________
Ed and Sharon
2010 Wildcat 28RKBS
2019 Ford F-250 XLT - AWESOME Truck!

I thought I was wrong once, but I was wrong!
EdJunior is offline   Reply With Quote
Old 09-17-2020, 09:14 PM   #6
Don't Camp Enough
 
DSMURPHY's Avatar
 
Join Date: Jul 2010
Location: Florida
Posts: 669
Leave it in standard drive. Your F350 won't even know it's back there.
__________________
2020 Prime Time Sanibel 3102
2016 F-350 King Ranch

DSMURPHY is online now   Reply With Quote
Old 09-17-2020, 09:14 PM   #7
Senior Member
 
SlowrideHD's Avatar
 
Join Date: Sep 2015
Location: North Alabama
Posts: 1,051
I think one advantage of using tow/haul mode is that your torque converter is locked while using it. My fuel mileage isn't any different using it or not using it.
__________________

2016 F350 CC Dually Powerstroke 4x4
2014 Cedar Creek 34RLSA w/Level Up
2007 HD Ultra Classic 103
SlowrideHD is offline   Reply With Quote
Old 09-17-2020, 09:40 PM   #8
Senior Member
 
JRBME's Avatar
 
Join Date: Jun 2019
Location: Charlotte, NC
Posts: 137
Does Ford have a trans temp indicator in the dash?
My Ram 6.7, R68 does and it indicates 200*f when pulling 12.5k in mid 80's ambient.
Engine and trans temp control is the goal of "tow mode".
A nice addition for the curious minded is something like a Edge CTS2 monitor. Amazing thing. That said, some mechanical basics are required to interpret the numbers. Setup is too easy. Click image for larger version

Name:	20200315_121847.jpeg
Views:	81
Size:	83.7 KB
ID:	239394
JRBME is offline   Reply With Quote
Old 09-17-2020, 10:53 PM   #9
Senior Member
 
Join Date: Feb 2018
Location: Alaska
Posts: 550
I don't know what Ford's threshold is for using tow/haul, but you can't be anywhere near it. For my Silverado 1500 it's 75% of GCWR, or 13,350 lbs. I'm nowhere near that pulling a 5000 lb trailer, so I don't use it. My 10 speed transmission handles it just fine and the temperature is normally in the 140s, even in mountainous terrain. A truck as heavy duty as yours will be fine in normal mode.
__________________
2019 Silverado LTZ 1500 6.2L 3.42 Max Trailering Package
2018 Freedom Express 192RBS
2016 Silverado LTZ 1500 5.3L 3.42
2015 Jeep Wrangler Rubicon 3.6L 4.10
2020 KZ 130RBSE
AlaskaErik is offline   Reply With Quote
Old 09-17-2020, 11:01 PM   #10
Senior Member
 
JRBME's Avatar
 
Join Date: Jun 2019
Location: Charlotte, NC
Posts: 137
Quote:
Originally Posted by AlaskaErik View Post
I don't know what Ford's threshold is for using tow/haul, but you can't be anywhere near it. For my Silverado 1500 it's 75% of GCWR, or 13,350 lbs. I'm nowhere near that pulling a 5000 lb trailer, so I don't use it. My 10 speed transmission handles it just fine and the temperature is normally in the 140s, even in mountainous terrain. A truck as heavy duty as yours will be fine in normal mode.
Alaska huh..You need to warm that puppy up. 140* is interesting. Too cold.
Ford 10 should be prox to 200-215 f.
JRBME is offline   Reply With Quote
Old 09-18-2020, 11:11 AM   #11
Senior Member
 
Join Date: Feb 2018
Location: Alaska
Posts: 550
Quote:
Originally Posted by JRBME View Post
Alaska huh..You need to warm that puppy up. 140* is interesting. Too cold.
Ford 10 should be prox to 200-215 f.
Others have reported the same temperature with that transmission. When I climb a steep hill at slower speeds, without towing, I can reach into the 170s, but at highway speeds, whether I'm towing or not, my temps are in the 140s. And that's all day long, flat and level, or in the mountains.
__________________
2019 Silverado LTZ 1500 6.2L 3.42 Max Trailering Package
2018 Freedom Express 192RBS
2016 Silverado LTZ 1500 5.3L 3.42
2015 Jeep Wrangler Rubicon 3.6L 4.10
2020 KZ 130RBSE
AlaskaErik is offline   Reply With Quote
Old 09-18-2020, 01:09 PM   #12
Senior Member
 
JRBME's Avatar
 
Join Date: Jun 2019
Location: Charlotte, NC
Posts: 137
Interesting. 140 is too cold. Need a thermostatically controlled heat exchanger...
Is the transmission an electro shift type thing? I had VW that probably ran that cool. Slick toy it was.
I'll assume that the trans cooler doesn't mingle with the engine cooling system.
Some of these modern gizmos are curious.
More research is in order.
JRBME is offline   Reply With Quote
Old 09-18-2020, 02:20 PM   #13
Senior Member
 
Join Date: Feb 2016
Posts: 226
Quote:
Originally Posted by 50panhead View Post
We have a Salem fsx260rt, weighs in at about 6000#s loaded with a tongue weight of roughly 700#s, pull it with a F-350 srw, 6.2L 10 speed trans. Do I need to shift to tow/haul and halve my fuel economy? Will leaving it it standard drive harm the tranny?
I always use the "manual mode" M.. to go up hills with my 5500 lb RV trailer.. just pick a gear and go.. works great.. Works great for going down hills too.. I don't like the Tow-Haul feature..
__________________
Clint...
2015 F350 4x4 gasser.. 2017 Rockwood 2506S TT
Ardenvoir, Washington (near Wenatchee)
clintbonnie73 is offline   Reply With Quote
Old 09-18-2020, 06:13 PM   #14
Senior Member
 
rsdata's Avatar
 
Join Date: Aug 2014
Location: Northern KY
Posts: 4,059
I always used to slip in and out of Overdrive, depending on hills. I felt I might have gained 1/2 MPG for all that trouble. My experience now with Tow/Haul is that in some towing situations Tow/Haul mode might give you better MPG... only 1MPG better, but unless you are in 100's of miles of flat land and little headwind, then Tow/Haul should be better, but I don't drive an F350... so your mileage may vary... certainly can't hurt either way you chose to drive it IMHO.

Tow/Haul should give you better/faster throttle response on hilly or mountainous driving.
__________________
"Freedom is never more than one generation away from extinction. " - Ronald Reagan
Too much of anything is bad, but too much good whiskey is barely enough.” – Mark Twain

2014 Shamrock 183
2014 RAM 1500 Bighorn Crew Cab, HEMI, 3.21 gears, 8 Spd, 4X4 TST TPMS
rsdata is offline   Reply With Quote
Old 09-18-2020, 07:04 PM   #15
Senior Member
 
Join Date: Feb 2020
Posts: 340
Dont overthink it. You wont harm the tranny. As stated above drive it in standard and if it feels boggy, use tow/haul mode.
__________________
2205S Rockwood
F 150 Lariat 3.5 Ecoboost Fx4 Max Tow
Equalizer WDH
flyflotrtim is offline   Reply With Quote
Old 09-18-2020, 07:52 PM   #16
Scoundrel
 
HangDiver's Avatar
 
Join Date: Feb 2017
Location: Colorado/Florida
Posts: 1,876
Note that using Tow/Haul mode does much more than just change the shift map. Tow/haul reduces the amount of time the clutch packs are slipping which reduces wear and tear and helps the trans to run cooler. It locks the torque converter more quickly also helping to keep trans fluid temps cooler.
__________________
2014 Micro Lite 19fd
2015 F-150 5.0L V8 XLT Crew Cab, 4x4, Tow Package, 36 gal tank, 3.55 locker, 1891 payload, Integrated Brake Controller, Roadmaster Active Suspension

Wooden Spoon Survivor
HangDiver is offline   Reply With Quote
Old 09-18-2020, 08:43 PM   #17
Now a "Top Member"
 
EdJunior's Avatar
 
Join Date: Feb 2010
Location: Roman Forest, TX
Posts: 2,600
Quote:
Originally Posted by flyflotrtim View Post
Dont overthink it. You wont harm the tranny. As stated above drive it in standard and if it feels boggy, use tow/haul mode.
Simple, accurate, good post.
__________________
Ed and Sharon
2010 Wildcat 28RKBS
2019 Ford F-250 XLT - AWESOME Truck!

I thought I was wrong once, but I was wrong!
EdJunior is offline   Reply With Quote
Old 09-18-2020, 10:39 PM   #18
Tundra 2014
 
Join Date: May 2018
Location: Texas
Posts: 896
Transmission

Put it in Tow/Haul. It will not hurt your milage much, if any. It will help your transmission to run cooler due to less slippage. It might help slightly in braking due to staying in gear longer.
I did not know you could get a F-350 w/ 6.2 and the 10 speed. I thought you had to have the 7.3 or 6.7 diesel to get the 10 speed per Ford.
Tundra 2014 is offline   Reply With Quote
Old 09-18-2020, 11:57 PM   #19
Senior Member
 
DieselDrax's Avatar
 
Join Date: Feb 2018
Location: Monticello, IL
Posts: 1,692
Quote:
Originally Posted by Tundra 2014 View Post
I did not know you could get a F-350 w/ 6.2 and the 10 speed. I thought you had to have the 7.3 or 6.7 diesel to get the 10 speed per Ford.
Click image for larger version

Name:	IMG_5913.jpg
Views:	38
Size:	196.6 KB
ID:	239444
__________________
2017 GMC Canyon - CCLB, 4x4, 2.8L Duramax, ARE Z-series shell
2013 Shamrock 21SS
DieselDrax is online now   Reply With Quote
Old 09-20-2020, 08:27 PM   #20
Senior Member
 
Sgt. Schultz's Avatar
 
Join Date: Oct 2010
Posts: 275
Do you have a special orders truck? F-350 srw, 6.2L 10 speed trans this is not an available option AFAIK - you should have the 6 spd with the 6.2 - the tow/haul is helps the computer in your truck in selecting shift points
__________________
PT Avenger 33BHS-TE
2020 f-250
Sgt. Schultz is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.



All times are GMT -5. The time now is 08:27 PM.