great video now, how do you know if they are sticking after you have unlocked them? I am having a popping noise when i turn and i think a hub lock is sticking it started after i went into 4x4. Also have a dang humming noise and done replaced both front wheel hubs it's gotta be either the locking hubs or ujoints/cv joint
Ford's design for the 4WD system means that when the hubs are locked, everything in the front end spins, just like you'd expect. With the hubs unlocked, the front axle shafts should not spin. What this means is that if you can always tell if your hub is actually locked by jacking the front end up and spinning the wheel. If your axles spin with the wheel, the hub is engaged. If not, it's disengaged. Ford uses engine vacuum to engage the hubs, so with the engine off and them manually unlocked they should always be disconnected. That's the point of the override on the hub itself - if you have a failed vacuum line, you can still engage 4WD.
Great vid and thanks, when one front hub goes and in 4x4, (with both front hubs locked) is there power to the rear wheels only or the rear wheels and the front tire with a good hub?
The superduty front diffs are open, meaning they send power to the wheel with the least resistance. If you have a hub out, that is virtually zero resistance on that axle so it will spin free just like when I spun the axle but the wheel stayed still in the video. With a bad hub in 4x4, you do have power to the front end but that power never makes it to the ground so you are still effectively in two wheel drive.
@@redlineauto8519 Thanks so much, I’m up in northern Ontario, Canada. With a two mile private road, couldn’t understand what the issue is as all drive shafts & joints look good.. starting to panic as 10 inches of snow moves in.. I’ll jack her up and spin the wheel… looks like a straight forward fix.. thanks
I was hoping you would show a check of the vacuum diaphram on the hub for leaks. I think mine leaks. Thanks for the video.
great video now, how do you know if they are sticking after you have unlocked them?
I am having a popping noise when i turn and i think a hub lock is sticking it started after i went into 4x4. Also have a dang humming noise and done replaced both front wheel hubs it's gotta be either the locking hubs or ujoints/cv joint
Ford's design for the 4WD system means that when the hubs are locked, everything in the front end spins, just like you'd expect. With the hubs unlocked, the front axle shafts should not spin. What this means is that if you can always tell if your hub is actually locked by jacking the front end up and spinning the wheel. If your axles spin with the wheel, the hub is engaged. If not, it's disengaged. Ford uses engine vacuum to engage the hubs, so with the engine off and them manually unlocked they should always be disconnected. That's the point of the override on the hub itself - if you have a failed vacuum line, you can still engage 4WD.
What if you find a broken hub lock bolt ? What do you recommend doing
Great vid and thanks, when one front hub goes and in 4x4, (with both front hubs locked) is there power to the rear wheels only or the rear wheels and the front tire with a good hub?
The superduty front diffs are open, meaning they send power to the wheel with the least resistance. If you have a hub out, that is virtually zero resistance on that axle so it will spin free just like when I spun the axle but the wheel stayed still in the video. With a bad hub in 4x4, you do have power to the front end but that power never makes it to the ground so you are still effectively in two wheel drive.
@@redlineauto8519 Thanks so much, I’m up in northern Ontario, Canada. With a two mile private road, couldn’t understand what the issue is as all drive shafts & joints look good.. starting to panic as 10 inches of snow moves in.. I’ll jack her up and spin the wheel… looks like a straight forward fix.. thanks
YOU GREASED THE HUB?!
Why in the name of all that is holy would you not?
@@redlineauto8519 good question. Say you just replaced them both and still no 4x4 what’s next?