Gear ratio - Page 2 - Diesel Forum - TheDieselStop.com
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post #16 of 38 (permalink) Old 04-08-2018, 09:54 AM
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What a treat to read all this on my first visit! I just bought my first Ford truck and it seems I have done my homework from what I'm reading. I searched what seemed 'endlessly' for the right truck to pull a 16k # fiver and ended up with a '12 F350 King Ranch 4x4 Crew 6.7L with 3:73 gears, hell yeah! Thanks to all who responded to DA28!
That's what this forum is all about. Providing information and helping our fellow Ford diesel aficionados! Is yours a dually?

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post #17 of 38 (permalink) Old 04-09-2018, 07:20 AM
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Yes it is. I researched the pro's and con's of SRW/DRW for some time before deciding what I wanted. Then, I shopped and test drove and bargained til I got the truck I felt I needed. So, it was reassuring to read the posts here about towing heavy fivers with different gears cuz that's my primary intended use. I'll get my profile worked out soon and post a couple pics of the truck.
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post #18 of 38 (permalink) Old 04-11-2018, 01:47 PM
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You can't get 3.73 gears in a DRW on newer trucks.
For the F350, 3.55 is stock, 4.10 is an option.
The F450 is 4.30.

I am going to order a new truck soon and I will go with 3.55.
On my current truck, 35% of my miles are towing, so that is a lot of non towing miles. I want the lower rpm for better fuel economy.
Over 900 ft/lbs of torque, you are going to notice a difference in power/passing etc with no load.
My last truck had 4.30, 6.0L, with about 50% of my miles towing.
That thing only got 12mpg unloaded.

I do agree, I don't buy these trucks for the MPG, but every little bit help.
3.55 will be fine with the load the OP is talking. Unless he is going over the Rockies on a daily basis.
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post #19 of 38 (permalink) Old 06-10-2018, 07:46 AM
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You can get a 450 DRW with 410's. In a cab Chassis.
I have a 203" one and will be adding Super singles 41" tall and will change to 488's. If I was towing more or off road more the 617's would be in both pumpkins.

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post #20 of 38 (permalink) Old 06-10-2018, 08:21 AM
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We love our 2017 F450 with 4.30 gearing. I think, and this is only an unscientific opinion, that the lower gearing makes it a little easier on the engine to get going and easier to stay going. When an engine is straining, the economy goes down. We use our truck for hauling 99% of the time. So, we're quite happy with the 4.30.

You've had the 4.30 and didn't like it. Get the 3.55 if that's what you want.
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post #21 of 38 (permalink) Old 06-11-2018, 08:30 AM
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We love our 2017 F450 with 4.30 gearing. I think, and this is only an unscientific opinion, that the lower gearing makes it a little easier on the engine to get going and easier to stay going.
Actually you are right on the money here. The higher number, the easier and quicker from a start you will be. But then you suffer at high speeds. 1/8th mile drag cars will use significantly higher ratios than 1/4 mile cars.

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post #22 of 38 (permalink) Old 06-14-2018, 09:39 AM
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3.31 with 18" tires are about the same final ration as 3.55 with 20". 3.31 is fine at GCVWR.
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post #23 of 38 (permalink) Old 06-14-2018, 09:24 PM Thread Starter
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thanks folks, I have a truck on the way...dealer ordered , I didn't.
F350 SRW CC short bed 3.55 elec locking gears xlt premium package , snow plow prep , towing package.
5th wheel and gooseneck prep.


sold my 06 6.0

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post #24 of 38 (permalink) Old 06-20-2018, 01:12 PM
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Ford should create a new section to help people choose the correct vehicle. It should ask extensive questions about what the person plans to use the vehicle for in and then show you the recommended vehicle that perfectly fits your needs. I would think that would be fairly easy for them to create. Almost like filling out one of those on-line survey things. Let it ask what area they live in, how far they travel, do they ever go in areas with mountains, what's the maximum amount they will tow, will there be a 5th wheel involved, etc, etc. And based on all of those answers it will spit out a vehicle model and even show nearby dealer inventory or how to order it and pick a dealer to deliver to. Now that would be nice, wouldn't it? Or am I asking for too much?
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post #25 of 38 (permalink) Old 06-20-2018, 04:08 PM
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I thought that was called prospective buyer research......

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post #26 of 38 (permalink) Old 06-22-2018, 09:55 AM
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I thought that was called prospective buyer research......
Yeah, but some people are probably still confused. I'm sure over the years a lot of people have bought the wrong truck for their needs and ended up trading it in way sooner, losing a TON of money. Some people need an F-350 instead of an F-250. Some people needed an F-250 instead of an F-150. It all depends on the circumstance. It would be cool if each dealer had a scale so the people could bring their trailer and weigh it so they could know the exact truck to buy based on the actual weight or payload used.
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post #27 of 38 (permalink) Old 06-22-2018, 11:11 AM
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There are CAT scales you can pay to use. You can also use a closed weigh station. In other words do your research. Gear ratios are figured by the GVCWR. I'm happy with 3.31 with 18" rims on an F350 and I pull at or close to the gross. Pin weight is my biggest concern.
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post #28 of 38 (permalink) Old 06-22-2018, 11:17 AM
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Yeah, but some people are probably still confused. I'm sure over the years a lot of people have bought the wrong truck for their needs and ended up trading it in way sooner, losing a TON of money. Some people need an F-350 instead of an F-250. Some people needed an F-250 instead of an F-150. It all depends on the circumstance. It would be cool if each dealer had a scale so the people could bring their trailer and weigh it so they could know the exact truck to buy based on the actual weight or payload used.

It would be cool if dealers had sales people who understood towing needs and sold people the right truck. Then again, Ford advertises high towing numbers with a teeny tiny disclaimer that you can barely read stating on a certain model with certain options cleverly disguised as "When properly equipped".



Reading the towing guide, the superduty weights are all over the place with a long list of GCWR with no explanation regarding packages or trims they relate to. The only thing in the F150 guide that says anything is the model, trim and options to get the max tow and max cargo ratings, and if you were to skip reading that page, you would never know otherwise.

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post #29 of 38 (permalink) Old 06-22-2018, 01:27 PM
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I talk WAY OVER sales people when it come to trucks. I know more about the product line then they do. Of course they are trying to sell everything on the lot mind you. In the end my advice is free, they are trying to make a profit.
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post #30 of 38 (permalink) Old 06-23-2018, 08:21 AM
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I talk WAY OVER sales people when it come to trucks. I know more about the product line then they do. Of course they are trying to sell everything on the lot mind you. In the end my advice is free, they are trying to make a profit.
And the salespeople at the RV lots are even worse. They'll sell you a 20K lb gvw fifth wheel trailer and tell you that some folks tow these with their F150's. I actually heard that!

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