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11-01-2016, 05:47 PM
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#1
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Weekend Camper
Join Date: Oct 2016
Posts: 19
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engine RPM when towing.
Hi all, I'm new to forum joined yesterday. I'm towing a 5th wheel with a 2007 f250 super duty 5.4l. @ 65 mph I'm running around 3000 RPM, does this sound about right?
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11-01-2016, 06:11 PM
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#2
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Full Time Camper
Join Date: Apr 2006
Location: 1
Posts: 2,036
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It all depends on gearing. Personally that sounds high to me but I am not a Ford guy. If you know how many forward gears you have in the Transmission, count how many times the trans shifts to see if it goes through all the gears and into overdrive. Maybe overdrive is for some reason locked out?
My 2008 Chevy runs about 1800rpm but I have two overdrives.
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11-01-2016, 06:30 PM
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#3
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Weekend Camper
Join Date: Oct 2016
Posts: 19
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it's a ford torque shift transmission 5speed auto. on flat surface it will run around 2000 in overdrive but with traffic, hills, overpasses it seems I mainly stay @ 3000 rpm. Sometimes I'll turn overdrive off to keep from overworking the trans, that's when I'm running at 3000 RPM.
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11-01-2016, 06:42 PM
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#4
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Full Time Camper
Join Date: Mar 2013
Location: Florida
Posts: 650
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I'm also not a Ford guy but it sounds high. My 09 Silverado runs at 1800-2000 RPM's as well. I know some Ford guys will chime in soon.
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Bert, Cathy, Kylie & Kaitlin
2014 SunsetTrail Reserve 32BH
2009 Silverado 3500HD LTZ 4X4 6.6L Duramax
YouTube LetsRV Instagram LetsRV_
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11-01-2016, 07:28 PM
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#5
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Site Team
Join Date: Jan 2014
Location: VA
Posts: 1,715
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Welcome to the forum anotherrv!
__________________
2013 Silverado 2500HD LTZ CC 6.6L Duramax Diesel
2023 Rockwood 2445WS
Buster, miniature Dachshund
2023: 9 trips, 48 nights in 12 states, 2 provinces, 8120 miles
2022: 3 trips, 18 nights in 4 states, 2352 miles
2019: 7 trips, 43 nights in 6 states, 5336 miles
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11-01-2016, 09:42 PM
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#6
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Full Time Camper
Join Date: Jul 2006
Location: MS
Posts: 2,746
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The 5.4 is a gas burner guys, in a heavy duty Truck It probably has a high gear in it so it would make sense that the r's would be that high
__________________
Frank and Janet Henn
2000 Monoco Lapalma
being pushed by a 2004 Jeep Grand Cherokee
Traveling with Rainbow the wonder dog and now with Sunshine the rescue Schnauzer.
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11-02-2016, 10:30 AM
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#7
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Full Time Camper
Join Date: May 2011
Location: So. Cal.
Posts: 577
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Quote:
Originally Posted by anotherrv
it's a ford torque shift transmission 5speed auto. on flat surface it will run around 2000 in overdrive but with traffic, hills, overpasses it seems I mainly stay @ 3000 rpm. Sometimes I'll turn overdrive off to keep from overworking the trans, that's when I'm running at 3000 RPM.
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You have the 5r110 tranny which has a tow/haul feature, not an ODrive lockout. Using the tow/haul mode, the tranny does Not lock out overdrive. The tranny uses all of its gears, just the shifting points change, both accel and decel.
More then likely, you are pulling many of the time in one gear above o/drive.
Not sure what you're towing but the 5.4 struggles when towing heavy and the tranny adjusts for a better rpm fit.
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Bob and Better Half
2007 F-250 PSD, SW, CC, LB, 2WD
2006 TF32SS Cross Terrain Toy Hauler (sold)
Reese 16k slider
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11-03-2016, 02:06 PM
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#8
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New Camper
Join Date: Nov 2016
Location: UT
Posts: 8
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The RPM sounds high to me. My last two vehicles the 2011 f-150 and the 2011 f-250 diesel both on level straight highway 65 mph would not tow with any higher of an RPM than when I was not towing. (1800 and 2000 respectively) My Tacoma would sit at 4000 RPM most of the time while I towed. Looking back on the Tacoma it really is not a great trailer towing truck even though it was rated at 6500# towing so it was extremely under powered. The only time either of the Ford trucks go over 3000 rpm is on hills or high power demand situations.
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2006 Toyota Tacoma, 2008 18'Carson 5000lb
2011 F-150 Pulled 2005 Trail-Lite 32' 5100lbs
(currently) 2011 F-250 400hp 800trq 3.55axle Timbren SES, pulling 2016 Reserve 36DB 11,500
2015 20 nights
2016 14 nights
2017 22 nights
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11-03-2016, 05:13 PM
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#9
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Weekend Camper
Join Date: Oct 2016
Posts: 19
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thanks for the replies all, when towing I do use the tow/haul button for the trans. I also notice if I tow over 70 mph the rpm's seem to be more constant and not as much shifting. However I really don't care to tow at high speeds. I guess there always seem to be a trade off.
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11-05-2016, 03:33 PM
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#10
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Full Time Camper
Join Date: May 2011
Location: So. Cal.
Posts: 577
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Quote:
Originally Posted by anotherrv
thanks for the replies all, when towing I do use the tow/haul button for the trans. I also notice if I tow over 70 mph the rpm's seem to be more constant and not as much shifting. However I really don't care to tow at high speeds. I guess there always seem to be a trade off.
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With my diesel, shifting isn't that noticeable and not quite that often. However, when you have a 5.4, it's trying to keep you in a power zone best suited for that engine and shifting to keep there, will be far more often.
When I pulled a trailer with my Expy with a 5.4, I could downshift into second and not strain the motor or tranny. However, it had the 4r100 4 sp auto and could shift into second and lock it there.
You probably can downshift manually to 3rd but unfortunately, not to 4th to hold it and avoid multiple shifts with your 5r110.
I know some will say sixth, not fifth as your tranny really is a 6 speed that only uses 5 speeds unless really cold and 4th replaces 5th. Never mind those details.
__________________
Bob and Better Half
2007 F-250 PSD, SW, CC, LB, 2WD
2006 TF32SS Cross Terrain Toy Hauler (sold)
Reese 16k slider
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11-05-2016, 05:00 PM
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#11
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Full Time Camper
Join Date: Oct 2015
Location: ca
Posts: 574
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You have not stated what the GVWR is of what you are towing. That could make a huge deal in RPMS of the truck
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2015 Redwood 36RL pushing a 2015 Denali DRW
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11-05-2016, 05:56 PM
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#12
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Weekend Camper
Join Date: Oct 2016
Posts: 19
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OK thanks, i have put it in 3rd in traffic to keep from shifting back and forth, but at 3k rpm again, it would nice to lock in fourth.
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11-05-2016, 08:04 PM
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#13
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Site Team
Join Date: Sep 2012
Location: PA
Posts: 5,715
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My F150 tows 65 mph at 1900 rpms.
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Mark & Susan
Lehighton, Pennsylvania
EAGLE HT FIFTH WHEEL | 30.5CKTS - '13 Ford F150 SCREW - PullRite Superslide - Roadmaster Active Suspension
Member - "Northeast Adventures RV Rally Group" & "Mason-Dixon Bunch"
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11-06-2016, 07:27 AM
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#14
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Weekend Camper
Join Date: Oct 2016
Posts: 19
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Good morning Mark, do you know your differential ratio. Also I see you have a '13 335ss, we have a '11 335ss and found the the outer lower deck bedroom side is wet and rotted. Have you heard of a fix for this?
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11-06-2016, 07:42 AM
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#15
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Weekend Camper
Join Date: Oct 2016
Posts: 19
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The GVWR is 12380, I try to keep close to the dry weight which would be around 1000
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11-06-2016, 07:46 AM
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#16
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Site Team
Join Date: Dec 2007
Location: WI.
Posts: 9,154
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Mark and I have basically the same truck. Gear ratio is 3.73
Also with the Eco-Boost engine.
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11-06-2016, 10:55 AM
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#17
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Full Time Camper
Join Date: May 2011
Location: So. Cal.
Posts: 577
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Quote:
Originally Posted by anotherrv
The GVWR is 12380, I try to keep close to the dry weight which would be around 1000
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We still don't know if you have a 3.73 or 4.10 rear end ratio, or if it's a standard cab up to a crew cab. As you can see from my chart below, you could be as much as 3,200 lbs over max tow capacity.
Just maybe that would help to account for your engine running in 4th most of the time.
You have too much trailer for your truck.
__________________
Bob and Better Half
2007 F-250 PSD, SW, CC, LB, 2WD
2006 TF32SS Cross Terrain Toy Hauler (sold)
Reese 16k slider
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11-06-2016, 11:54 AM
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#18
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Site Team
Join Date: Sep 2012
Location: PA
Posts: 5,715
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Like Lloyd said, my rear end is a 3.73. Do not a have a problem with the bed deck getting wet and rotten. Sounds like the slide might have to be removed for repair.
__________________
Mark & Susan
Lehighton, Pennsylvania
EAGLE HT FIFTH WHEEL | 30.5CKTS - '13 Ford F150 SCREW - PullRite Superslide - Roadmaster Active Suspension
Member - "Northeast Adventures RV Rally Group" & "Mason-Dixon Bunch"
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11-07-2016, 05:38 AM
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#19
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Weekend Camper
Join Date: Oct 2016
Posts: 19
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The truck is a supercab with a 3.73 rear end.
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11-07-2016, 06:41 AM
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#20
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Site Team
Join Date: Dec 2007
Location: WI.
Posts: 9,154
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If you put all that information about your trailer and truck in your signature, we will all know at a glance what you have. It will help in answering your questions without having to ask for more info.
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