mileage
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Cargo Master
Joined: Feb 2002
Posts: 2,414
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From: Tucson USA
mileage
Has anyone disconnected the front driveshaft on a 4X and seen any improvement in mileage? I remember when I was younger people doing that to remove drag due to FWD setup. Just curious if it does do anything. have an FX4 but never use 4x and we are planning another trip for early October.
TIA
TIA
Token Redneck
Joined: Jun 2007
Posts: 9,339
Likes: 350
From: Breckenridge, TX
Meaningless, won't do a thing. With correctly functioning front hubs there's no parasitic loss from the driveshaft anyway because the front axle is disconnected from the wheels.
You driving 60-65 versus the 75-85 common on western interstates will make a much more significant impact.
You driving 60-65 versus the 75-85 common on western interstates will make a much more significant impact.
Lead Driver
Joined: Jul 2004
Posts: 6,951
Likes: 512
From: Foothills, CA
^^^^^ What Bryan said -- your driveshaft in the front is engaged by your transfer case for 4x4 use. Leave it in 2WD and drive a little slower. And if you really never need 4WD, consider changing to just a 2WD? They generally get the best mileage...
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Cargo Master
Joined: Feb 2002
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From: Tucson USA
Thanks guys but you dont understand. The wife hates going as slow as 60-65 when we travel and in the past the mileage was not that significantly different for 70-80. As why a FX4, got a deal on it new that made it less than a 2x (they lost it in the inventory and were going to have to pay interest from day 1) so the sales girl called and told me to come get it. It has been a good truck but its only for travel now as sold the TT and got a RV.
Token Redneck
Joined: Jun 2007
Posts: 9,339
Likes: 350
From: Breckenridge, TX
The best mod I ever did for fuel economy in my truck was to buy a Focus.
I've more than paid for this car with 110k miles of 35-40mpg versus 15-16mpg in the truck, especially with the equity rollover on buying it after putting 80k on another car before that, and 20k on a motorcycle before that back in the glory days of 2008 when diesel was $5/gal.
I've more than paid for this car with 110k miles of 35-40mpg versus 15-16mpg in the truck, especially with the equity rollover on buying it after putting 80k on another car before that, and 20k on a motorcycle before that back in the glory days of 2008 when diesel was $5/gal.
Hotshot
Joined: Dec 2014
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From: Jersey Shore
Thanks guys but you dont understand. The wife hates going as slow as 60-65 when we travel and in the past the mileage was not that significantly different for 70-80. As why a FX4, got a deal on it new that made it less than a 2x (they lost it in the inventory and were going to have to pay interest from day 1) so the sales girl called and told me to come get it. It has been a good truck but its only for travel now as sold the TT and got a RV.
In the past (speed) not significantly different in mileage with what vehicle?
Superdutys are bricks pushing through the air. The 2WD can get a little better mileage because they are lower to the ground.
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Cargo Master
Joined: Feb 2002
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From: Tucson USA
the truck gets about 6-7 less than wifes accord on highway and about 20 less than our hyundai tow car all driven at same speeds. Last trip we got about 17 with it so not terribly bad but could be better. Its comfort that it provides and not as tiresome to drive on extended trips. yes there are pros-cons to everything but ya try to make the best out of what ya got.
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Hotshot
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Brett Foote
Lead Driver
Joined: Jul 2004
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From: Foothills, CA
the truck gets about 6-7 less than wifes accord on highway and about 20 less than our hyundai tow car all driven at same speeds. Last trip we got about 17 with it so not terribly bad but could be better. Its comfort that it provides and not as tiresome to drive on extended trips. yes there are pros-cons to everything but ya try to make the best out of what ya got.
Crap my bi-turbo 4.7 Benz will pull mid 20s on the highway and I drive it "briskly" you might say...
I wouldn't mind seeing 17+ in the truck (I think it does get around that at 70 on the fwy) -- I gave up checking mileage and just enjoy it...
Scott
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From: France
Originally Posted by Hank85713
Thanks guys but you dont understand. The wife hates going as slow as 60-65 when we travel and in the past the mileage was not that significantly different for 70-80. As why a FX4, got a deal on it new that made it less than a 2x (they lost it in the inventory and were going to have to pay interest from day 1) so the sales girl called and told me to come get it. It has been a good truck but its only for travel now as sold the TT and got a RV.
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