Originally Posted by marcham
Beware of the f250 crew cab SWB diesel, it only carries 26 gallons... The f350 has 36.
Inaccurate info. All 2015 SuperDuty pickups with gas engine get the 35-gallon gas tank.
Diesel fuel tank size is related to bed length, not model. 8' bed gets the 37.5 gallon diesel fuel tank on F-250, F-350 SRW and F-350 DRW. The 26 gallon diesel tank is on the SuperDuty SRW pickups with diesel engine and shorty bed. (Ford no longer makes a shorty dually, so all DRWs have the big fuel tank.)
Originally Posted by chefbob
The 4.30 gear is available on the f-350 diesel when you choose the "high capacity tow package"
Misleading info . The high capacity tow package is available only on a dually 4x4 CrewCab diesel, and requires the 4.30 axle. But the 4.30 axle is available on any F-350 DRW, gas or diesel. The high capacity Tow pkg is not available with the gas engine.
Originally Posted by Tollyman
Ford has a choice of 3.73:1 or 4.30:1, which is approximately 15% difference. So, in theory would that translate to a 15% difference in fuel economy?
Only when the engine is coasting along with no load and moderate speed, so the engine is not working up a sweat.
If you're going to tow more than a rowboat with a 2015 gas engine in an F-350 DRW, then you want the 4.30 optional axle ratio. Unloaded MPG will be slightly better with the 3.73 axle, but towing MPG will be worse because the engine has to work harder.
The new 6.2L gas engine is a lot more engine than the 5.4L in your old truck. If you are happy with the towing performance of your 2005 with the 5.4L, then I suspect you'll be esthetic with the 6.2L and 4.30 axle.
But most people would not be happy towing a heavy trailer with an F-350 DRW with the gas engine. The diesel has so much more torque that it's a pleasure to tow a heavy trailer up a mountain pass. If you spring the big bucks for the diesel dually, then be sure to also order the high capacity towing package. You'll LOVE
Grumpy ole man with over 60 years towing experience. Now my heaviest trailer is a 7,000-pound enclosed cargo trailer, RV is a 5,600 pound Skyline Nomad Joey 196-S, and my tow vehicle is a 2019 F-150 Lariat 3.5L EcoBoost SuperCab with Max Tow (1,904 pounds payload capacity).