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Old 10-12-2020, 12:59 PM   #41
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2021 25' Globetrotter
Cleveland , Ohio
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Quote:
Originally Posted by dmcgaugh View Post
Canít answer the ďhow is that workingĒ part of the question, but I just ordered a F350 7.3 with 3.73. Iíve agonized over the decision of 3.73 vs 4.30.

And what Iíve conceived myself is this: I will never tow 8800 lbs and am more likely to get a smaller trailer versus larger. While I use the truck 90% towing, I like the idea of doing under 2k RPMs at 75 MPH on the freeway when not towing.

At 60 MPH, I would be doing just under 2k RPMs in 8th which seems pretty ideal for towing medium weights as well, then dropping down to 7th hops RPMs up to nearly 2400, which I would imagine going over overpasses, etc.

Also, Iíll never have bigger tires than the 275/70/18 that come with the truck because I wouldnít be able to fit it in my garage.

Of course if Iím wrong about all of that, I can always buy 4.30s after the fact. Not cheap, but not enough to cause me to want to get rid of an otherwise great truck.

Would love to have the option of 3.90 or 4.10 also, but it seems that no such ratios exist even in the aftermarket for the Dana M275 axle.

Why a 350 with a gas engine? 250 will have near 3k payload and rides much nicer than a 350 without the weight of a Diesel.
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Old 10-12-2020, 01:33 PM   #42
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2021 25' Globetrotter
Austin , Texas
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Just for additional reference my numbers for a 2020 F250 7.3L platinum:

GVWR
10000

FGAWR
4800

RGAWR
6340

GVW (no cargo/pass)
7074

Max payload
2926

GCVWR
21800

Tow Capacity
14700
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Old 10-12-2020, 11:14 PM   #43
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Seattle , Washington
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Quote:
Originally Posted by matthewk View Post
Why a 350 with a gas engine? 250 will have near 3k payload and rides much nicer than a 350 without the weight of a Diesel.


350 primarily because I can get 3.73 vs 3.55 with the 250. Thatís only about 5% lower gear ratio, but every bit counts. Also I get a slightly more stout rear end in the 350 (Dana M275). As far as ride, 250 vs 350 should ride about the same since the only difference is the overload springs on the 350 which is likely to never be engaged with the load Iíll be carrying.
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Old 01-18-2021, 07:03 AM   #44
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2015 30' International
FREDERICK , Maryland
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Quote:
Originally Posted by dmcgaugh View Post
Canít answer the ďhow is that workingĒ part of the question, but I just ordered a F350 7.3 with 3.73. Iíve agonized over the decision of 3.73 vs 4.30.

And what Iíve conceived myself is this: I will never tow 8800 lbs and am more likely to get a smaller trailer versus larger. While I use the truck 90% towing, I like the idea of doing under 2k RPMs at 75 MPH on the freeway when not towing.

Of course if Iím wrong about all of that, I can always buy 4.30s after the fact. Not cheap, but not enough to cause me to want to get rid of an otherwise great truck.

Would love to have the option of 3.90 or 4.10 also, but it seems that no such ratios exist even in the aftermarket for the Dana M275 axle.
Hi, I am thinking about ordering a 7.3 Godzilla F250 and am thinking about the gearing. I am not sure about the 3.73. vs. 4.30.
How did the 3.73 gearing work out for you so far? It looks like from your profile pic you have a longer trailer. What did you use for towing before?
I have a 30' International and am currently towing with a 6.7L Powerstroke (which is a towing dream), but it is getting up there in mileage and starting to cost more and more money for expensive diesel parts.
Thanks for any input.
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Old 01-18-2021, 09:21 AM   #45
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In my 2011 F-350 I upgraded to a 50 gallon Titan tank - swap out for OEM, quick reflash at the dealer for tank calibration (fuel gage) and good to go!
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Old 01-19-2021, 08:58 AM   #46
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IHO Get the 3.73 better fuel milage and less RPM's!!
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Old 01-19-2021, 01:19 PM   #47
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2020 16' Nest
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Saint Augustine , Florida
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I have the 7.3 with the 3.75. Iíve also had the 3.75 with the 3.5 eco boost. Both used to tow are 25í ft 2006 safari. We havenít had any issues with that transmission,6 speed or 10 speed. We got the same mpgís towing with either vehicle.
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Old 08-12-2021, 01:30 PM   #48
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2019 25' International
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Greetings! I appreciate all the discussion. We ordered a 2022 F250 Lariat crew cab short bed with the 7.3L gas, 10 spd trans, 3.55 rear end. I thought a lot about the 3.55 vs. 4.3 but I'm towing a 25FT International FBT so I think that will work fine. Ordered in July, dealer said 3-6 months....we'll see.
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