Howl
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Joined: Aug 2004
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From: Rodeo, Ca.
Howl
=AZVX6O8vb33McLumx0M9xu0SJVbl9PCscW41cj4-iiN-4YUDLs2TdqypkN6jR3YeWP5gXPcsC2t5LMWGehTH05etpxPRaC AvAQFIG9P9tFC3bC_wMUXEz7HdmiBInaWuBFo&__tn__=%2CO% 2CP-R]m ·
Ok, got a question. My '20 F-150 XLT 4x4 just started making a howling noise when in 2wd, sounds like the front end. It goes away when I switch into 4wd high though. Aren't the front hubs supposed to free wheel in 2wd? I jacked front up and axles and driveshaft turn when I rotate wheels. Any ideas? I'll check with dealer when they can check it.
Ok, got a question. My '20 F-150 XLT 4x4 just started making a howling noise when in 2wd, sounds like the front end. It goes away when I switch into 4wd high though. Aren't the front hubs supposed to free wheel in 2wd? I jacked front up and axles and driveshaft turn when I rotate wheels. Any ideas? I'll check with dealer when they can check it.
More Turbo
Joined: Dec 2003
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My 18 f150 started what may be the same thing last winter. Mine does it any time it rolling , 2wd or 4wd. I put it on stands with all four off the ground and it's quiet in 2wd but I hear it 4wd. My dealer said tires but it makes the noise with the tires off the ground! I have an appointment with another dealer so hopefully I'll get a better answer. Howl is probably the best way to describe it.
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Joined: Dec 2003
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The dealer that looked at it said they didn't find any problem with engage and disengage. They kept saying tire noise even after I told them it made the noise with the tires off the ground. I'll see what the other dealer tells me this week.
Cargo Master
Joined: Jul 2003
Posts: 3,363
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Maybe take them out with you and show them the noise and how it stops when your go in 4wd.
Another thing you can do to help them see that the noise isn't the tires is unplug the wiring from the solenoid which deactivates the system and locks the front end in and then go for a long drive that way, if you have the transfer case with the auto position that keeps to IWEs locked in full time also.
Cargo Master
Joined: Oct 2010
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From: barton city mi
=AZVX6O8vb33McLumx0M9xu0SJVbl9PCscW41cj4-iiN-4YUDLs2TdqypkN6jR3YeWP5gXPcsC2t5LMWGehTH05etpxPRaC AvAQFIG9P9tFC3bC_wMUXEz7HdmiBInaWuBFo&__tn__=%2CO% 2CP-R]m ·
Ok, got a question. My '20 F-150 XLT 4x4 just started making a howling noise when in 2wd, sounds like the front end. It goes away when I switch into 4wd high though. Aren't the front hubs supposed to free wheel in 2wd? I jacked front up and axles and driveshaft turn when I rotate wheels. Any ideas? I'll check with dealer when they can check it.
Ok, got a question. My '20 F-150 XLT 4x4 just started making a howling noise when in 2wd, sounds like the front end. It goes away when I switch into 4wd high though. Aren't the front hubs supposed to free wheel in 2wd? I jacked front up and axles and driveshaft turn when I rotate wheels. Any ideas? I'll check with dealer when they can check it.
Upon engine start, truck has to be driven about 1/2 mile before solenoid is energized allowing vacuum to IWEs, this happens at EVERY key cycle. Ford says it's a warmup cycle for front diff.
Howl, not a grind or ratcheting sound? Wheel bearing? Have you had a level done ?
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Cargo Master
Joined: Oct 2010
Posts: 2,762
Likes: 536
From: barton city mi
My 18 f150 started what may be the same thing last winter. Mine does it any time it rolling , 2wd or 4wd. I put it on stands with all four off the ground and it's quiet in 2wd but I hear it 4wd. My dealer said tires but it makes the noise with the tires off the ground! I have an appointment with another dealer so hopefully I'll get a better answer. Howl is probably the best way to describe it.
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More Turbo
Joined: Aug 2004
Posts: 689
Likes: 6
From: Rodeo, Ca.
Usually they are "free wheeeling". With engine off, no, IWEs locked due to no vacuum, and solenoid has vented off vacuum.
Upon engine start, truck has to be driven about 1/2 mile before solenoid is energized allowing vacuum to IWEs, this happens at EVERY key cycle. Ford says it's a warmup cycle for front diff.
Howl, not a grind or ratcheting sound? Wheel bearing? Have you had a level done ?
Upon engine start, truck has to be driven about 1/2 mile before solenoid is energized allowing vacuum to IWEs, this happens at EVERY key cycle. Ford says it's a warmup cycle for front diff.
Howl, not a grind or ratcheting sound? Wheel bearing? Have you had a level done ?
More Turbo
Joined: Dec 2003
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Cargo Master
Joined: Oct 2010
Posts: 2,762
Likes: 536
From: barton city mi
I mentioned wheel bearing, because at the end of the warmup period, the IWEs release, and loading on the wheel bearing could change. It's evidently a rotational issue, and the only thing that should be turning is the spindle/wheel bearing. Please let us know what the dealer says, it'll help to educate all.
Cargo Master
Joined: Oct 2010
Posts: 2,762
Likes: 536
From: barton city mi
So, in 2H, on stands, no noise. On stands in 4H it does. When on the ground, in 2H, do you get the howl?
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More Turbo
Joined: Aug 2004
Posts: 689
Likes: 6
From: Rodeo, Ca.
I mentioned wheel bearing, because at the end of the warmup period, the IWEs release, and loading on the wheel bearing could change. It's evidently a rotational issue, and the only thing that should be turning is the spindle/wheel bearing. Please let us know what the dealer says, it'll help to educate all.
More Turbo
Joined: Dec 2003
Posts: 510
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A ;lot of good discussion here. I hope the original poster gets answers on his truck. I just got home with mine and it's quiet once again. They found the left front wheel bearing bad. That's what I told the first dealer that told me tires.
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Joined: Aug 2004
Posts: 689
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From: Rodeo, Ca.
I had a call from the dealer and Ford got back to them with some more tests to run which they're doing. I'll post with what I find out.