Reply
 
Thread Tools Display Modes
Old 08-06-2011, 05:57 PM   #1
Senior Member
 
Bilcin's Avatar
 
Join Date: Apr 2011
Location: Philadelphia PA
Posts: 385
Towing in Overdrive

I searched the forum and didn't see an answer to this question. If there is a thread with the answer I apologize. I took a round trip of 1000 and used the OD lockout option. I was amazed at my poor MPGs of 8.6 MPG. At 65 MPH I am doing about 2850 RPMs. On a flat section of highway I put the truck in OD and the RPMs dropped and during the 12 miles stretch it went from OD to 3rd gear only once. I was traveling at 65 MPH and towing a Wildwood 26TBSS with my 2005 Ford F150 5.4 liter V8 3.73 gears. How many times is switching gears from OD to 3rd gear too much? I kept an eye on the engine temp gauge and it remained in the same position as when I am not towing.

Bilcin
__________________

__________________
Bill & Cindy McKenna
Philadelphia PA
2015 Palomino Puma 32DBKS
2005 Ford Excursion 6 liter Turbo Diesel
Bilcin is offline   Reply With Quote
Old 08-06-2011, 06:03 PM   #2
Senior Member
 
Join Date: Jul 2010
Posts: 241
I guess my question is this, why block out the overdrive? Use it, that's what it's there for!
Jack
__________________

__________________
2006 Flagstaff 831RLSS Travel Trailer

2007 Chevy 2500HD 'Classic' with the Duramax engine.

Converting a 1956 GMC PD4501 Scenicruiser, ex Greyhound into a motor home.
jackhartjr is offline   Reply With Quote
Old 08-06-2011, 06:13 PM   #3
Senior Member
 
JoeR's Avatar
 
Join Date: May 2011
Location: Colorado
Posts: 219
Does the Ford have a towing package with a larger tranny cooler? If not, I'd consider putting one one for OD towing, as well as, a tranny temp guage.

My 1/2 ton truck has the towing package and it came with the larger cooler and temp guage. I don't mind towing across country in OD. And 8.5mpg is better than 7.5mpg.

Most trucks I've seen get between 7 and 12mpg towing larger rigs.

JR
__________________
JoeR is offline   Reply With Quote
Old 08-06-2011, 06:25 PM   #4
Senior Member
 
Bilcin's Avatar
 
Join Date: Apr 2011
Location: Philadelphia PA
Posts: 385
Yes, my truck has the tow package, trans radiator sits in front of the bigger engine radiator. The reason I am asking is if the transmission isn't "searching" for 3rd gear or OD is it ok to use OD or towing in OD heating up the trans to the point of damage being done?
__________________
Bill & Cindy McKenna
Philadelphia PA
2015 Palomino Puma 32DBKS
2005 Ford Excursion 6 liter Turbo Diesel
Bilcin is offline   Reply With Quote
Old 08-06-2011, 07:52 PM   #5
Member
 
daverain's Avatar
 
Join Date: Sep 2010
Posts: 86
Bilcin,
It's my understanding from Ford that the trans will not be damaged with some od to 3rd. shifts. The trans in your truck is most likely either a 4r100 or 4r 70 or 75, either case it's computer controlled and will stay out of lockup (od) if the converter gets too hot. My excursion, equipped with a trans temp gauge will lock out of od if the temp gets too hot, but that's only in the mountains, on I95 its in od almost all the time. Just my 2 sense.
Dave and Rainy
__________________
daverain is offline   Reply With Quote
Old 08-06-2011, 08:42 PM   #6
Senior Member
 
Bilcin's Avatar
 
Join Date: Apr 2011
Location: Philadelphia PA
Posts: 385
Quote:
Originally Posted by daverain View Post
Bilcin,
It's my understanding from Ford that the trans will not be damaged with some od to 3rd. shifts. The trans in your truck is most likely either a 4r100 or 4r 70 or 75, either case it's computer controlled and will stay out of lockup (od) if the converter gets too hot. My excursion, equipped with a trans temp gauge will lock out of od if the temp gets too hot, but that's only in the mountains, on I95 its in od almost all the time. Just my 2 sense.
Dave and Rainy
Dave,

Thanks, I was kind of thinking the same thing. I read that excessive gear shifting between OD and 3rd gear would overheat and damage the trans. So it makes sence that limited shifting will not do any harm. What are your thoughts about lower RPMs with the same torque on the trans? Does this affect the trans temp?
__________________
Bill & Cindy McKenna
Philadelphia PA
2015 Palomino Puma 32DBKS
2005 Ford Excursion 6 liter Turbo Diesel
Bilcin is offline   Reply With Quote
Old 08-06-2011, 08:43 PM   #7
Senior Member
 
jimh's Avatar
 
Join Date: Jul 2010
Location: Lake Charles, La.
Posts: 1,531
you probably have something in ur owners manual abt it. on my diesel, the recommendation is to leave it in overdrive; the computer will make the choice.
i have taken it out of overdrive on steep grades to help with the braking.
__________________
jimh is offline   Reply With Quote
Old 08-06-2011, 08:49 PM   #8
Site Team
 
acadianbob's Avatar
 
Join Date: Mar 2008
Location: St. Paul, Minnesota
Posts: 2,919
I have exactly the same truck and tow in overdrive whenever possible. When not hilly or a headwind.
__________________
http://i421.photobucket.com/albums/pp297/acadianbob/IMG_2757.jpg
2012 F150 FX4 Ecoboost, 2016 Surveyor 274BHS
2003 Yamaha FJR1300, Demco Premiere Slider
1969 John Deere 1020, 1940 Ford 9N, 1948 Ford 8N
Jonsered 535, Can of WD-40, Duct Tape
Red Green coffee mugs
acadianbob is offline   Reply With Quote
Old 08-06-2011, 08:56 PM   #9
Senior Member
 
Join Date: Jun 2011
Location: Central NY
Posts: 145
I added a TransGo shift kit to my Avalanche. The 3-4 shift is sloppy and the kit firms/quickens it up as well as other shifts. Also did the larger Corvette servos. I leave it in overdrive..
__________________
2012 Jayco 33 RLDS
2004 Chevrolet Avalanche 2500
2007 TBSS AWD
Hybrid21SS is offline   Reply With Quote
Old 08-06-2011, 09:20 PM   #10
Senior Member
 
Join Date: Jun 2010
Location: Ontario
Posts: 719
Overdrive .... Unless it starts hunting for a gear. When I see a steep hill, before it has a chance to start hunting, I kick it out of overdrive.

I also have a ScanGaugeII which shows my transmission fluid temperature. if I see the temperature rising, I start to go slower and not push the truck to keep my regular speed *55-60 mph), I disengage the overdrive until whatever is causing the TF temperature to rise disappears.
__________________

__________________
2009 Ford F-150 XLT/XTR 5.4l, CrewCab. long bed
2011 Surveyor SV-291
Goomph 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



» Virginia Campgrounds

Reviews provided by




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 03:35 PM.