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Open Roads Forum  >  Tow Vehicles

 > Going back to gasser based on needs (need advice)

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Hannibal

Tampa Bay Area

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Posted: 12/18/20 05:25am Link  |  Quote  |  Print  |  Notify Moderator

steve-n-vicki wrote:

20,000 miles on a 2020 F350 super crew 8 foot bed 4 x 4 , 7.3 L Godzilla, 10 speed Transmission, so far the engine has performed extremely well, the transmission has performed extremely well, I get from a high of 16.4 to 9.8 mpg, truck has pulled everything that I have put behind it without complaint


That’s about what I’m seeing as well. I went back to gas in 2005 to a 5.7L Hemi powered 2500 Ram after 21 years of diesels. Great engine! Transmission ratios were very odd. The truck developed the dreaded driveline drive that the Dodge shop couldn’t figure out. Nor could a local drive shaft shop. Our 2010 5.4L F-250 has been the best truck I’ve ever owned. Wife drives it now since we picked up our 2020 7.3L/3.55 F-250 September 11. We haven’t towed the TT more than 50 miles at a time yet so no real highway towing mileage yet but it’s looking like 8.5-9.5 on flat ground. Love the sound of the 7.3 and the 10spd is great so far. No buyer’s remorse at all.


2020 F250 STX CC SB 7.3L 10spd 3.55 4x4
2010 F250 XLT CC SB 5.4L 5spdTS 3.73
ex '95 Cummins,'98 12v Cummins,'01.5 Cummins,'03 Cummins; '05 Hemi
2017 Jayco 28RLS TT 32.5'. Reese HP Trunnion 800

ognend

South Florida

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Posted: 12/18/20 07:27am Link  |  Quote  |  Print  |  Notify Moderator

Hannibal wrote:

...we picked up our 2020 7.3L/3.55 F-250 September 11. We haven’t towed the TT more than 50 miles at a time yet so no real highway towing mileage yet but it’s looking like 8.5-9.5 on flat ground. Love the sound of the 7.3 and the 10spd is great so far. No buyer’s remorse at all.


I am curious, I may be misunderstanding this, but in towing, do you not want the 4.30 instead of the 3.55?

Hannibal

Tampa Bay Area

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Posted: 12/18/20 08:14am Link  |  Quote  |  Print  |  Notify Moderator

ognend wrote:

Hannibal wrote:

...we picked up our 2020 7.3L/3.55 F-250 September 11. We haven’t towed the TT more than 50 miles at a time yet so no real highway towing mileage yet but it’s looking like 8.5-9.5 on flat ground. Love the sound of the 7.3 and the 10spd is great so far. No buyer’s remorse at all.


I am curious, I may be misunderstanding this, but in towing, do you not want the 4.30 instead of the 3.55?


That is correct. The ten speed has plenty of gear reduction for grunt work around the yard and campgrounds. Especially with 4x4 in 4Lo if I ever need it. Boat ramps being my reason for 4x4. On the interstate towing our TT in Tow Haul mode, it likes 8th gear. And I still have 10th for lower rpm running empty.

theoldwizard1

SE MI

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Posted: 12/18/20 08:19am Link  |  Quote  |  Print  |  Notify Moderator

ognend wrote:

I am curious, I may be misunderstanding this, but in towing, do you not want the 4.30 instead of the 3.55?

If you check the 20201 Ford Towing Guide page 23, you will see that you don't get much more towing capacity with the 4.30 rear axle.

If you are close to the max trailer weight (14,000/15,000) OR spend more than 50% of the miles towing, I would get the 4.30. If not, go with the 3.55.

(You do have to wonder why there is no 3.73 or 4.10 option ?)

EDIT : Looks like they have added the 3.73 axle to the F250 !

kellem

Shenandoah valley,VA

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Posted: 12/18/20 12:02pm Link  |  Quote  |  Print  |  Notify Moderator

4.30 is standard with Tremor package.
3.55 is the most common gears paired with the 7.3 and 10spd.

Unless you're towing to max capacity, the 10spd gear spacing mitigates the shortcomings found in transmissions with less gears which creates more drastic jumps in RPMS while towing.

Another consideration is Ford may be trying to squeeze out some more fuel economy with this large displacement engine with higher gears, can't blame them.

ognend

South Florida

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Posted: 12/18/20 12:51pm Link  |  Quote  |  Print  |  Notify Moderator

Thank you all for educating me on the axle ratios.

Crespro

SoCal

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Joined: 07/23/2004

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Posted: 12/18/20 05:00pm Link  |  Quote  |  Print  |  Notify Moderator

Hi.

Good discussion. My truck is rated 18.9K/26K with the 4.30 and 14.8K/21.8K with the 3.55.


Crespro 2021 Grand Design 310GK-R, 2020 F250LB, 7.3L, 4.30, Reese 27K

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