Rear end ratios on F-250 6.7 Diesel

[KennyG]

Originally Posted by jbrnigan

In the real world, probably makes no difference, when you consider the 6.7 PSD is the king of HP and TQ.

Not trying to stir the pot and I know this isn't a truck forum; but since you were on that topic this is interesting to watch and the surprise they got with the actual results...
Although this is the 2017 model specs, the 2018 tests will be just as interesting...

https://www.youtube.com/watch?v=emJcrYuJArg

[Force]

The problem with my Ford is the low end, 0-30 mph response. It's kind of a dog. What it should do is burn the tires off the back of the thing if I romp on the pedal but instead the computer says "yeah no, how about this slow roll up to 30 and THEN you can have your power?"

Aftermarket solutions are out there but I haven't pulled the trigger yet (Stealth Products for example)

[TWP723]

3.55 is the normal ratio the Super Duty's were lotted with. You can order different but the 3.55 is plenty. The ratios have dropped due to the increase in horsepower and torque. 3.73's are no longer justified.

[Midnightmoon]

Originally Posted by Force

The problem with my Ford is the low end, 0-30 mph response. It's kind of a dog. What it should do is burn the tires off the back of the thing if I romp on the pedal but instead the computer says "yeah no, how about this slow roll up to 30 and THEN you can have your power?"

Aftermarket solutions are out there but I haven't pulled the trigger yet (Stealth Products for example)

This is a fairly common complaint over on the Cummins Ram forums also. The trucks feel sluggish off the line. It's apparently a sign of the times with the torque management programming that all of these manufactures use.

[wcowan]

I recently got a 2017 F350 with the diesel engine. I believe the only two axle ratios available on the SRW trucks are 3.31 and 3.55. I have the 3.55. I haven't had a chance to tow our trailer yet but just driving the truck I can feel the difference from my former 2010 F150. You should see a massive improvement in your comfort and sense of security and control while towing.

On the option front, there isn't really a need to get the multi-camera option. The standard rear camera provides excellent visibility for hooking up a trailer. The one option that seems ridiculous at first but is well worth the money is the power fold mirrors. This truck is big. You will be folding in the mirrors almost every time you park. That will get tedious quickly if you have to do it by hand. The camper option is also a good option. You get a bit more payload and a rear sway bar for about a hundred bucks. You can't go wrong with that.

[repacs0103]

Originally Posted by Force

The problem with my Ford is the low end, 0-30 mph response. It's kind of a dog. What it should do is burn the tires off the back of the thing if I romp on the pedal but instead the computer says "yeah no, how about this slow roll up to 30 and THEN you can have your power?"

Aftermarket solutions are out there but I haven't pulled the trigger yet (Stealth Products for example)

I have a 2011 6.7 Ford and my partner has a 2016 GMC Denali Duramax 3500. I’ve towed with his Duramax and it feels like a total dog compared to my Ford when it was stock. As someone else pointed out it’s definitely a function of torque management on all the newer trucks, trying to save the transmission.

Now that my Ford is tuned and deleted there’s no comparison.


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[Force]

I read the Ford transmission is good for something like 1,500 ft/lbs of torque. I just want 100% of the 925 ft/lbs I paid for lol.

[LiftedAWDAstro]

Well you have it...at the crank under test room conditions! In reality, all engines are well below the rated number due to losses in the drivetrains.

[Packerbacker_TX]

Originally Posted by Greg&Nancy

After a year of camping with our 2017 28RLS pulling with a 5.0 F-150 TV we're upgrading to the F-250 Super Duty Lariet with the 6.7 Diesel. Went all the way to Wyoming from WV last summer and the F-150 did an great job but with a trip further west we want more gusto when climbing the bigger rocks. Which rear end ratio should we be looking at? The truck we're considering has a 3.55 rear end. Could some of you help me understand which rear end ratio is best for pulling our 28RLS with the F-250??

@Greg&Nancy - Good idea upgrading from the F-150. I'm sure you'll see some marked improvement in payload and towing. We've also upgrade from our 15' F-150 3.5 EB to a new 17' F-250 and the driving is night and day different.

* F-150: Ave 15 MPG, 3.55, quick/spry with that 3.5 EB (more like a sports car)
* F-250: Ave 12 MPG, 3.73, slower like a Clydesdale but it's a real "work" truck.

There really isn't any comparing the 2 trucks as they're built completely different. We got a 6.2 gasser, so I do see some lag headed up hills - which probably doesn't happen with Diesel. Also, no engine brake - have to rely on Tow Mode/gearing to keep the downhill in check. Overall, I'm pretty impressed with the F-250 after driving it for the last 7 months and towing our rig 500+ miles.

[turbo130]

Originally Posted by Greg&Nancy

After a year of camping with our 2017 28RLS pulling with a 5.0 F-150 TV we're upgrading to the F-250 Super Duty Lariet with the 6.7 Diesel. Went all the way to Wyoming from WV last summer and the F-150 did an great job but with a trip further west we want more gusto when climbing the bigger rocks. Which rear end ratio should we be looking at? The truck we're considering has a 3.55 rear end. Could some of you help me understand which rear end ratio is best for pulling our 28RLS with the F-250??

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Used to tow our 2014 27 DSRB White Hawk with my wifes 2008 Nissan Armada, which handled our TT quite nicely, but I wanted a newer than my 1991 ford with a 351CID engine. I couldn't afford a new one so we purchased a 2006 F250 SuperDuty with the 6.0 diesel. What a difference, diesel is the way to go, it is so much more pleasurable to drive on long trips with our TT.