3.55 or 3.73 rear end w/ ecoboost pulling 6000lbs, 75mph
01-15-2013, 10:21 PM
#11
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I was surprized!!
01-15-2013, 10:39 PM
#12
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Thanks
Thanks for the replies!
I actually got to hook up to the trailer that we use (loaded) to a friend of a friends 2012 Ecoboost Crew with max tow today. Power is there to do the job, mileage I'm not so sure. I ran about 10 miles on the freeway at 75mph. Had about a 15mph crosswind it would not pull 6th gear even with the cruise on. Average mileage on the truck was showing upper 5 to 6 mpg. I was expecting 8 at the worst, 5-6 might be tough to swallow over a 2000 mile trip. This trailer is a 24' v-nose drive in drive out alum. snowmobile trailer. So the axles are underneath, therefore the trailer sits 2-2.5 feet off the ground. I'm thinking this trailer pulls very hard, another friend was saying this about this sled trailer and he pulls it with a 7.3 diesel. I believe him now! The owner of the truck we used pulls a 32' 5th wheel travel trailer at 75mph in 6th on the flats he said no problem. Time for a different trailer maybe?
I actually got to hook up to the trailer that we use (loaded) to a friend of a friends 2012 Ecoboost Crew with max tow today. Power is there to do the job, mileage I'm not so sure. I ran about 10 miles on the freeway at 75mph. Had about a 15mph crosswind it would not pull 6th gear even with the cruise on. Average mileage on the truck was showing upper 5 to 6 mpg. I was expecting 8 at the worst, 5-6 might be tough to swallow over a 2000 mile trip. This trailer is a 24' v-nose drive in drive out alum. snowmobile trailer. So the axles are underneath, therefore the trailer sits 2-2.5 feet off the ground. I'm thinking this trailer pulls very hard, another friend was saying this about this sled trailer and he pulls it with a 7.3 diesel. I believe him now! The owner of the truck we used pulls a 32' 5th wheel travel trailer at 75mph in 6th on the flats he said no problem. Time for a different trailer maybe?
01-15-2013, 11:04 PM
#13
V nose trailers actually aren't any better mpg than a flat nose. And as you discovered, a crosswind on a vnose is same as pulling faster due to the increased frontal area.
SLOW DOWN!
Trailer tires are rated for MAXIMUM 65mph. The tires can be damaged because they arent designed to be run at those speeds and you can very well have a blowout. A blowout with a trailer at 75 mph = bad.
As a side benefit, you will get into the ten mpg range with your combo.
SLOW DOWN!
Trailer tires are rated for MAXIMUM 65mph. The tires can be damaged because they arent designed to be run at those speeds and you can very well have a blowout. A blowout with a trailer at 75 mph = bad.
As a side benefit, you will get into the ten mpg range with your combo.
01-16-2013, 07:40 AM
#15
Senior Member
IMHO unless you get the MaxTow, at least, and preferably the HD payload (for the stiffer suspension if not for the increased payload), you don't really have a truck. Or not a useful one anyway.
01-16-2013, 08:20 AM
#16
Senior Member
If you look in the owner's manual the Limited and the Harley models have their load rating! Can anyone explain that?
It is not a problem for me because I never haul a lot and most of the time I am the only one in the truck.
I only use the truck to haul my 7 X 14 enclosed trailer with my Polaris Ranger in it to shoot sporting clays on weekends.
Trailer loaded weight is 4,000#.
It is not a problem for me because I never haul a lot and most of the time I am the only one in the truck.
I only use the truck to haul my 7 X 14 enclosed trailer with my Polaris Ranger in it to shoot sporting clays on weekends.
Trailer loaded weight is 4,000#.
01-16-2013, 09:32 AM
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V nose trailers actually aren't any better mpg than a flat nose. And as you discovered, a crosswind on a vnose is same as pulling faster due to the increased frontal area.
SLOW DOWN!
Trailer tires are rated for MAXIMUM 65mph. The tires can be damaged because they arent designed to be run at those speeds and you can very well have a blowout. A blowout with a trailer at 75 mph = bad.
As a side benefit, you will get into the ten mpg range with your combo.
SLOW DOWN!
Trailer tires are rated for MAXIMUM 65mph. The tires can be damaged because they arent designed to be run at those speeds and you can very well have a blowout. A blowout with a trailer at 75 mph = bad.
As a side benefit, you will get into the ten mpg range with your combo.
I would have to look at the trailer tire rating. I think they are 15 or 16" tires. I pretty sure they are Goodyear Marathons? I'll check it out I'm curious. Thanks
01-16-2013, 11:03 AM
#18
Senior Member/Vietnam Vet
3.73 plus max tow.
By the way, trailer tires are speed rated to 65mph maximum.
At 65 mph with 3:55 gears, you will be at 1500 rpm. Flat ground pulling the travel trailer it will mostly stay in sixth. But any amount of hilly terrain and it will drop to fifth, unlock the torque converter, and turn 2100-2200rpm.
At 65 mph with 3:73 gears, you are around 1850rpm, much closer to the EB peak torque production. Much less likely to downshift. In this particular case, mpg is actually better with 3:73.
Will it pull it with 3:55s? Yep. Will it pull it even easier with 3:73s? Yep.
Cargo capacity/tongue weight is what you will be close on, as mentioned above.
When you are shopping, open the drivers door and look at the yellow sticker that tells maximum cargo. You might be surprised just how little cargo some of the loaded luxury trucks have.
Here's mine for my xlt.
Attachment 183328
By the way, trailer tires are speed rated to 65mph maximum.
At 65 mph with 3:55 gears, you will be at 1500 rpm. Flat ground pulling the travel trailer it will mostly stay in sixth. But any amount of hilly terrain and it will drop to fifth, unlock the torque converter, and turn 2100-2200rpm.
At 65 mph with 3:73 gears, you are around 1850rpm, much closer to the EB peak torque production. Much less likely to downshift. In this particular case, mpg is actually better with 3:73.
Will it pull it with 3:55s? Yep. Will it pull it even easier with 3:73s? Yep.
Cargo capacity/tongue weight is what you will be close on, as mentioned above.
When you are shopping, open the drivers door and look at the yellow sticker that tells maximum cargo. You might be surprised just how little cargo some of the loaded luxury trucks have.
Here's mine for my xlt.
Attachment 183328
Last edited by SkiSmuggs; 01-17-2013 at 12:09 PM.
01-16-2013, 11:11 AM
#19
Senior Member
Slow Down? Thats the last thing you want to do when your spending a whole day driving across Nebraska! Lol!
I would have to look at the trailer tire rating. I think they are 15 or 16" tires. I pretty sure they are Goodyear Marathons? I'll check it out I'm curious. Thanks
I would have to look at the trailer tire rating. I think they are 15 or 16" tires. I pretty sure they are Goodyear Marathons? I'll check it out I'm curious. Thanks
Since my 15" Marathon's are supposed to be at 65psi (which is already as hard as rock) according to the sticker on the trailer, going to 75psi so I could do 75mph would probably jar the trailer to pieces.
And I just don't trust trailer ST tires, even the Goodyears. My Marathons are from China, and they've got all these weird bulges and lumps on the sidewalls (normal I'm told). They just don't seem anywhere near the same quality as my Michelins LT's (which I keep at 50 psi).
And 75 mph burns gas like crazy. So I usually keep it at 100km/h (62 mph) in the right hand lane. Some states (Michigan?) keep trucks and trailers at 55 mph. Now that's a relaxing drive.
01-16-2013, 12:12 PM
#20
Senior Member
According to Goodyear's Service Bulletin PSB #2006-06, their Marathon ST tires can go to 75mph by increasing the weight determined cold inflation pressure by 10psi.
Since my 15" Marathon's are supposed to be at 65psi (which is already as hard as rock) according to the sticker on the trailer, going to 75psi so I could do 75mph would probably jar the trailer to pieces.
And I just don't trust trailer ST tires, even the Goodyears. My Marathons are from China, and they've got all these weird bulges and lumps on the sidewalls (normal I'm told). They just don't seem anywhere near the same quality as my Michelins LT's (which I keep at 50 psi).
And 75 mph burns gas like crazy. So I usually keep it at 100km/h (62 mph) in the right hand lane. Some states (Michigan?) keep trucks and trailers at 55 mph. Now that's a relaxing drive.
Since my 15" Marathon's are supposed to be at 65psi (which is already as hard as rock) according to the sticker on the trailer, going to 75psi so I could do 75mph would probably jar the trailer to pieces.
And I just don't trust trailer ST tires, even the Goodyears. My Marathons are from China, and they've got all these weird bulges and lumps on the sidewalls (normal I'm told). They just don't seem anywhere near the same quality as my Michelins LT's (which I keep at 50 psi).
And 75 mph burns gas like crazy. So I usually keep it at 100km/h (62 mph) in the right hand lane. Some states (Michigan?) keep trucks and trailers at 55 mph. Now that's a relaxing drive.
