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Old November 13th, 2012, 06:54 AM   #1
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Default F250 hubs.. Locked vs unlocked

Approaching the first winter with manual hubs on the f250.. I've read people saying driving with the front end engaged will destroy the drive train and you will lose 5mpg, and I've read people who leave them locked all year around and the only thing they notice is the wheel hop making hard right turns. What is the truth?

If I'm driving to the UP pulling a sled trailer and It's snowing out, can I engage the hubs and drive 400 miles down I-75 without issue? Knowing that I might only need to use 4wd in the snow belts and pulling back unto the highway after refueling?

I can't imagine the drag on the front drive train is enough to alter the mileage considerably on 9000 pounds moving down the expressway, but I may be wrong.
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Old November 13th, 2012, 07:12 AM   #2
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1-2 MPG in my truck, if that. I prefer to leave them unlocked thru the summer for MPG and the slightly added vibration of turning the axles and d-shaft. Otherwise in that and every other truck I've owned I typically lock them in November and unlock in march unless doing a long trip where I know for a fact I won't need the 4wd
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Old November 13th, 2012, 07:13 AM   #3
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1-2 MPG in my truck, if that. I prefer to leave them unlocked thru the summer for MPG and the slightly added vibration of turning the axles and d-shaft. Otherwise in that and every other truck I've owned I typically lock them in November and unlock in march unless doing a long trip where I know for a fact I won't need the 4wd
Same here.
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Old November 13th, 2012, 07:46 AM   #4
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1-2 MPG in my truck, if that. I prefer to leave them unlocked thru the summer for MPG and the slightly added vibration of turning the axles and d-shaft. Otherwise in that and every other truck I've owned I typically lock them in November and unlock in march unless doing a long trip where I know for a fact I won't need the 4wd
x3
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Old November 13th, 2012, 07:58 AM   #5
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1-2 mpg in my truck, if that. I prefer to leave them unlocked thru the summer for mpg and the slightly added vibration of turning the axles and d-shaft. Otherwise in that and every other truck i've owned i typically lock them in november and unlock in march unless doing a long trip where i know for a fact i won't need the 4wd
x4

Before I replaced the non-functioning auto ones they stayed locked for two years and about 50K miles and never had an issue.
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Old November 13th, 2012, 08:06 AM   #6
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Thanks guys, I figured as much.

Chad, what are you getting for MPG? I was around 17 this summer, and as of late I'm around 15.5-16.. Is that from winterized diesel?
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Old November 13th, 2012, 08:06 AM   #7
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1-2 MPG in my truck, if that. I prefer to leave them unlocked thru the summer for MPG and the slightly added vibration of turning the axles and d-shaft. Otherwise in that and every other truck I've owned I typically lock them in November and unlock in march unless doing a long trip where I know for a fact I won't need the 4wd
x5 but 4-5mpg loss for me.
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Old November 13th, 2012, 08:30 AM   #8
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Drive 1 gen Explorer over Michigan I can tell you once I put in 4wd you lose 4 mpg instant and engine work harder too though 5" of snow on highway at 40-45 mph.


F350 4wd I would say not much noticeable due short trip but would say 1-2 mpg until you have good u-joints and grease it often.

If it was me tow trailer though snow road I would have in 4WD IMMEDIATE!!!! Try drive explorer with broke hubs for 2 days of snowstorm is nightmare. Maybe it drive fine to you but when you want turn or gas or brake it will not do anything for while most like it lose traction and put you in wrong place you didn't want.
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Old November 13th, 2012, 08:33 AM   #9
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x5 but 4-5mpg loss for me.
Seriously? Sounds like something might be wrong up front ??
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Old November 13th, 2012, 09:27 AM   #10
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That's what I thought too but when I had the chitty hubs stick locked (known issue with f350 in my truck's era) they replaced shafts, etc. Never made a difference. It's an '02 f350 7.3l on 315's. Don't know what to tell you. Open front and makes quite a difference in my rig. Don't get me wrong. End of the month once I put the plow on it will get locked in for the winter, just saying... Maybe it was 3-4 but it was noticeable. Been a couple years since I've compared. Driveline was fresh at the time.
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Old November 13th, 2012, 09:56 AM   #11
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Pull over and lock them if needed
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Old November 13th, 2012, 10:04 AM   #12
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Pull over and lock them if needed
I was referencing the opposite. If I leave my street (which is not plowed) and I then drive down I-75 for 15 miles, I'll be fine.
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Old November 13th, 2012, 10:15 AM   #13
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I was referencing the opposite. If I leave my street (which is not plowed) and I then drive down I-75 for 15 miles, I'll be fine.
buy a plow
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Old November 13th, 2012, 10:15 AM   #14
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I was referencing the opposite. If I leave my street (which is not plowed) and I then drive down I-75 for 15 miles, I'll be fine.
we always just left them open and pulled off if it got bad and locked them , its not going to hurt your front end but if your front end is not %100 it will show up faster

the superduty trucks are great in the snow, you may not even use 4wheel
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Old December 27th, 2012, 01:08 PM   #15
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BTW, I went to engage my hubs yesterday and I look down and it says "AUTO <---------> MANUAL"


I learned I had auto hubs. haha. works perfect.
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Old December 27th, 2012, 01:11 PM   #16
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we always just left them open and pulled off if it got bad and locked them , its not going to hurt your front end but if your front end is not %100 it will show up faster

the superduty trucks are great in the snow, you may not even use 4wheel
HAHAHAhahaaa...mines gets stuck on flat ground in wet grass...great in the snow! HAHAHhahahahaha
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Old December 27th, 2012, 01:39 PM   #17
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HAHAHAhahaaa...mines gets stuck on flat ground in wet grass...great in the snow! HAHAHhahahahaha
do you have an open rear axle? My old white superduty (with a topper on it for weight) would go just about anywhere in 2wd with good tires and the factory posi.

But it couldn't stop for shit in the snow.
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Old December 27th, 2012, 01:58 PM   #18
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do you have an open rear axle? My old white superduty (with a topper on it for weight) would go just about anywhere in 2wd with good tires and the factory posi.

But it couldn't stop for shit in the snow.
lsd in the rear..however i think it needs to be rebuilt....4x4 works great..2wd, not so much
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Old December 27th, 2012, 02:14 PM   #19
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Originally Posted by clarkstoncracker View Post
Thanks guys, I figured as much.

Chad, what are you getting for MPG? I was around 17 this summer, and as of late I'm around 15.5-16.. Is that from winterized diesel?
I am usually in the 18-19 range in the summer, but I don't have a 6.0, I just have 6.0 badges In the winter I drop down to 14-15. with 4wd engaged I am probably closer to 13mpg.

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we always just left them open and pulled off if it got bad and locked them , its not going to hurt your front end but if your front end is not %100 it will show up faster

the superduty trucks are great in the snow, you may not even use 4wheel
My truck blows asshole in 2wd in the snow. accelerates at the speed of sloth.

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do you have an open rear axle? My old white superduty (with a topper on it for weight) would go just about anywhere in 2wd with good tires and the factory posi.

But it couldn't stop for shit in the snow.
mine doesn't seem to stop great in the snow either. In 4wd it tracks like a tank, accelerates like a ferrari, and "drives" great. Panic stops terribly.
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Old December 29th, 2012, 06:16 PM   #20
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Quote:
Originally Posted by clarkstoncracker View Post
BTW, I went to engage my hubs yesterday and I look down and it says "AUTO <---------> MANUAL"


I learned I had auto hubs. haha. works perfect.
watch ebay and craigslist for a set of used manual hubs.
your auto hubs will stop working at the worst time.
they are vacuum operated and they blow!

when im on open freeway i unlock them, unless its getting pretty snowy.
once there is snow on the ground they are locked.
running them locked wont hurt anything but mpg's.
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