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 > 4x4 front hub

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MFL

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Posted: 12/05/21 04:10pm Link  |  Quote  |  Print  |  Notify Moderator

4x4ord:

Thanks for posting the pics and link for the solenoid you used.

My SuperDuty is a 13, and seems that your statement, 17 on up example, would work the same as mine. On page one of your thread, Bob's description of the vacuum operation sounds to be the opposite use of vacuum? He speaks of Ford's IWE system. When I did a bit of research, I did read about a change of use of vacuum with IWE around about 14.

Is this IWE system what we have, or does not apply to our SuperDuty model? Not much info in my owners manual. It does not make sense to have a vacuum loss default to 4x4. How would you get any distance on dry pavement, if unable to access 2wd? Only two settings on hubs, lock, or auto.

Jerry





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Posted: 12/05/21 05:25pm Link  |  Quote  |  Print  |  Notify Moderator

I may have answered my own questions, concerning integrated wheel end (IWE), by looking at the system itself. It does appear to work opposite, using vacuum to hold 2wd, releasing it, to allow 4wd.

Near as I can tell, this a F150 specific system, and one that has been problematic. I'm thinking too light duty for a HD truck application.

Jerry

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Posted: 12/05/21 06:15pm Link  |  Quote  |  Print  |  Notify Moderator

^^^^ There is no issue having the hubs locked with the transfer case in 2wd on dry pavement. The front axles can rotate at whatever speed the front tires drive them so long as the transfer case is in 2wd. The purpose behind unlocking the front hubs in 2wd is really just to save the tiny bit of power/fuel required to spin the front differential gears.


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MFL

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Posted: 12/05/21 06:28pm Link  |  Quote  |  Print  |  Notify Moderator

^^Absolutely correct, I've been over thinking this to the point of not thinking. This can/did cause a brain fart. Thanks for the wakeup! [emoticon]

Time to watch a movie.

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Posted: 12/06/21 01:10am Link  |  Quote  |  Print  |  Notify Moderator

cummins2014 wrote:


I could manually lock my hubs on my 99 Superduty ,and they were also auto .


That's how I recall on the 2001 I had. Problem was unless you manually operated them regularly, they would get harder and harder to turn. I made a habit of ever month or so moving them a few times. Even then it took a tool (stuffing box wrench from the boat) to turn them.

Luckily, never went off roading, so never needed 4x4 (it just happened to come with the truck I otherwise found a good deal on).


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Posted: 12/06/21 05:36am Link  |  Quote  |  Print  |  Notify Moderator

Huntindog wrote:

Be careful with 2 low. It puts a lot of torque to the axles. On some vehicles the manual warns about too much torque in 2 low damaging the axle. This is not much of a problem in 4 low as there are two axles recieving torque


You might have a point, I don't know much about 4X4. My limited understanding is 2-lo would be when you have no traction issues, but wanted to move real slow. Engine speed would never be much above idle. I don't know what the reduction is in the transfer case, but looking at the graph of torque output it would need to be pretty deep to match max.

Now for 1 of my off the wall ideas; Could lock-out hubs be put on a front wheel drive car, use to tow 4 down? Or on the back of rear wheel drive 4 down?

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Posted: 12/06/21 08:10am Link  |  Quote  |  Print  |  Notify Moderator

valhalla360 wrote:

cummins2014 wrote:


I could manually lock my hubs on my 99 Superduty ,and they were also auto .


That's how I recall on the 2001 I had. Problem was unless you manually operated them regularly, they would get harder and harder to turn. I made a habit of ever month or so moving them a few times. Even then it took a tool (stuffing box wrench from the boat) to turn them.

Luckily, never went off roading, so never needed 4x4 (it just happened to come with the truck I otherwise found a good deal on).


Thats what happened with one of mine , got to the point it would not lock manually or auto. At that point as said replaced with manual hubs ,and plugged the vacuum lines .

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Posted: 12/06/21 08:56am Link  |  Quote  |  Print  |  Notify Moderator

MFL wrote:

It does not make sense to have a vacuum loss default to 4x4. How would you get any distance on dry pavement, if unable to access 2wd? Only two settings on hubs, lock, or auto.

Jerry


Transfer case


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Posted: 12/06/21 09:00am Link  |  Quote  |  Print  |  Notify Moderator

JRscooby wrote:



Now for 1 of my off the wall ideas; Could lock-out hubs be put on a front wheel drive car, use to tow 4 down? Or on the back of rear wheel drive 4 down?


Some rock buggies run rear locking hubs.
Theoretically would work on a fwd car. But yes, totally off the wall unless you're into intricate custom mechanical parts design and fabrication.

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Posted: 12/06/21 09:42am Link  |  Quote  |  Print  |  Notify Moderator

Anyone know what the torque multiplication of the 10r140's torque converter is and/or if the 2020+ Super Duty still uses a transfer case with a 2.72:1 gear reduction in low range?

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