Hum, Rumble on a cold 27 deg morning

[CajunMick]

On my way to driver license office, cold 27 deg morning, driving 40 mph on smooth blacktop, could sorta hear and feel a hum/rumble. Huh, what is this? Let up gas, it disappeared. Step on gas, kinda feel, hear it. I wear a hearing aid, so any sound questionable. But feel it. I do hard acceleration it seems to quieten a bit, until reach a steady speed, around 40 mph.

Cabin cold, so had heater blower at maybe 50% speed. Thinking maybe the blower humming, shaking a bit? Adjusting blower speed didn’t seem make any difference. Adjust duct from both top vent and floor, to just top vent made no difference .

At a stop light, on go, trying to ascertain if tranny cold, playing its shift points. Seems when training shifts from low to 2nd, 3rd + as truck speeds, the hum, vibes crop up.

So, parked, sitting a bit, thinking a heat soak might make difference warming thing up. Driving home, ambient now 31 deg, still make, feel that hum/vibe feel.

No CEL or warning crops up. At home, pop hood to check, engine idling , nothing unusual then.

Could it be tires? It’s warming up over next few days, intend to drive over same blacktop, see what happens.

My question to others out there, ever experienced similar situation?

And truck just turned 5,001 miles.

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[TROGDOR!!!]

I'm sorry: 27 degrees Fahrenheit? What is that? -2c? That's not very cold. There's really no need for anything to warm up. What is a heat soak? That's absurd. (sorry, eh?)

We have weather of -33 to -40c here and I've never heard of such a thing. Whatever you're thinking needs to happen to warm things up at -2c just doesn't....that's....strange...

Please, take it from someone who has been driving in an (actually) cold climate for four decades. None of that is necessary or even makes sense.

As for rumbling, sorry I can't help with that. A mild chill in the air shouldn't cause that with any vehicle. Hell, that's not even normal with the temperatures we have up here. I really don't think it's temperature related, and if you want to talk about cold weather driving, I'm your guy. (not that you're driving in the cold - you're not). And, no, -2c will not affect the shift points in your transmission. My coworkers and I had a good laugh about that. (again, sorry, eh?)

 

[MM Mav]

Very low mileage CV axle failure ?

 

[Jeff D.]

CajunMick, I've had something not exactly the same, but similiar, that I found odd.

I live fairly close to a car wash. When I wash my truck, drive real slow home to keep it from throwing snow/salt all over the sides, and park it right away, if it's cold (10F or less) when I next start it, I'll feel a rumble, almost like the exhaust system was touching the frame. It'll make a low droning sounds inside the cab too. I get out and listen and the truck is just as quiet as always on the outside.

When I drive, this sensation/sound goes away fairly soon. In a mile or so.

It only does this after I wash the truck, don't drive it far then park it, and it's well below freezing.

My guess is water is freezing somewhere and it's transferring the engine's vibrations thru to the body. As soon as it melts, it goes away and doesn't return until the next wash/park/cold. I don't even worry about it anymore when it happens, which has been maybe a 1/2 dozen times since I bought it.

Not sure if that could be related to your issue or not? Good luck figuring it out!

 

[CajunMick]

I'm sorry: 27 degrees Fahrenheit? What is that? -2c? That's not very cold. There's really no need for anything to warm up. What is a heat soak? That's absurd. (sorry, eh?)

We have weather of -33 to -40c here and I've never heard of such a thing. Whatever you're thinking needs to happen to warm things up at -2c just doesn't....that's....strange...

Please, take it from someone who has been driving in an (actually) cold climate for four decades. None of that is necessary or even makes sense.

As for rumbling, sorry I can't help with that. A mild chill in the air shouldn't cause that with any vehicle. Hell, that's not even normal with the temperatures we have up here. I really don't think it's temperature related, and if you want to talk about cold weather driving, I'm your guy. (not that you're driving in the cold - you're not). And, no, -2c will not affect the shift points in your transmission. My coworkers and I had a good laugh about that. (again, sorry, eh?)

[/QUOTe
Appreciate the reply. Not as cold in Texas as in Edmonton. My concern is first time I’ve experienced this, especially on a cold day. Earlier in the week when warmer clime, didn't experienced this. So somewhat alarmed given driven much colder time.

By heat soak, meant drove truck for <20 minutes from cold start, then shutdown. Hope heat, any from engine/tranny would really warm up fluids some just sitting, immobilize without benefit of any cold air cooling effect.

You guys stay warm up there.

 

[CajunMick]

CajunMick, I've had something not exactly the same, but similiar, that I found odd.

I live fairly close to a car wash. When I wash my truck, drive real slow home to keep it from throwing snow/salt all over the sides, and park it right away, if it's cold (10F or less) when I next start it, I'll feel a rumble, almost like the exhaust system was touching the frame. It'll make a low droning sounds inside the cab too. I get out and listen and the truck is just as quiet as always on the outside.

When I drive, this sensation/sound goes away fairly soon. In a mile or so.

It only does this after I wash the truck, don't drive it far then park it, and it's well below freezing.

My guess is water is freezing somewhere and it's transferring the engine's vibrations thru to the body. As soon as it melts, it goes away and doesn't return until the next wash/park/cold. I don't even worry about it anymore when it happens, which has been maybe a 1/2 dozen times since I bought it.

Not sure if that could be related to your issue or not? Good luck figuring it out!

Thanks for the reply. My truck was in garage overnight, not wet at all. My drive was short, in stop n go traffic, <20 minutes. Noticed cabin heat slow to warm up. I just find it odd truck sound, felt different than earlier in the week with warmer temperature. This weekend, next week promising to be warmer. I hope to drive it on same road, see if any change.

 

[Ozarkbeard]

...That's not very cold...

OP lives in a subtropical climate, where it seldom gets below freezing - sometimes only once or twice a year. Some winters, not at all. OP is rightfully concerned because the truck is acting up; and not having experienced below freezing weather very often at all, they have every right to be concerned that it might be a problem related to those temps.

IMO, your post came across as condescending and not helpful at all.

 

[CajunMick]

OP lives in a subtropical climate, where it seldom gets below freezing - sometimes only once or twice a year. Some winters, not at all. OP is rightfully concerned because the truck is acting up; and not having experienced below freezing weather very often at all, they have every right to be concerned that it might be a problem related to those temps.

IMO, your post came across as condescending and not helpful at all.

Thanks Ozark…I recognize sameness. Difference in viewpoints…the hot and cold. I’ve been to Canada on biz couple times, both in dead of winter. It gets cold indeed. My body not acclimated and could say just walking up there made my body rumble a bit. LoL.

 

[Timothyd]

On my way to driver license office, cold 27 deg morning, driving 40 mph on smooth blacktop, could sorta hear and feel a hum/rumble. Huh, what is this? Let up gas, it disappeared. Step on gas, kinda feel, hear it. I wear a hearing aid, so any sound questionable. But feel it. I do hard acceleration it seems to quieten a bit, until reach a steady speed, around 40 mph.

Cabin cold, so had heater blower at maybe 50% speed. Thinking maybe the blower humming, shaking a bit? Adjusting blower speed didn’t seem make any difference. Adjust duct from both top vent and floor, to just top vent made no difference .

At a stop light, on go, trying to ascertain if tranny cold, playing its shift points. Seems when training shifts from low to 2nd, 3rd + as truck speeds, the hum, vibes crop up.

So, parked, sitting a bit, thinking a heat soak might make difference warming thing up. Driving home, ambient now 31 deg, still make, feel that hum/vibe feel.

No CEL or warning crops up. At home, pop hood to check, engine idling , nothing unusual then.

Could it be tires? It’s warming up over next few days, intend to drive over same blacktop, see what happens.

My question to others out there, ever experienced similar situation?

And truck just turned 5,001 miles.

I had a little rumble for a few seconds when I first started up but it was -8F. I let it warm for a couple of minutes and still friggin cold inside execpt for the wonderful seats and wheel but drove fine. I find the tires don't get flat spots till maybe -15 below but it goes away after a little driving. But I have the hybrid, different animal.

Check for ice/snow built up in the wheel well?

 

[mkrdsr1]

On my way to driver license office, cold 27 deg morning, driving 40 mph on smooth blacktop, could sorta hear and feel a hum/rumble. Huh, what is this? Let up gas, it disappeared. Step on gas, kinda feel, hear it. I wear a hearing aid, so any sound questionable. But feel it. I do hard acceleration it seems to quieten a bit, until reach a steady speed, around 40 mph.

Cabin cold, so had heater blower at maybe 50% speed. Thinking maybe the blower humming, shaking a bit? Adjusting blower speed didn’t seem make any difference. Adjust duct from both top vent and floor, to just top vent made no difference .

At a stop light, on go, trying to ascertain if tranny cold, playing its shift points. Seems when training shifts from low to 2nd, 3rd + as truck speeds, the hum, vibes crop up.

So, parked, sitting a bit, thinking a heat soak might make difference warming thing up. Driving home, ambient now 31 deg, still make, feel that hum/vibe feel.

No CEL or warning crops up. At home, pop hood to check, engine idling , nothing unusual then.

Could it be tires? It’s warming up over next few days, intend to drive over same blacktop, see what happens.

My question to others out there, ever experienced similar situation?

And truck just turned 5,001 miles.

Is it a Hybrid?

 

[KCRoadrash]

I'm sorry: 27 degrees Fahrenheit? What is that? -2c? That's not very cold. There's really no need for anything to warm up. What is a heat soak? That's absurd. (sorry, eh?)

We have weather of -33 to -40c here and I've never heard of such a thing. Whatever you're thinking needs to happen to warm things up at -2c just doesn't....that's....strange...

Please, take it from someone who has been driving in an (actually) cold climate for four decades. None of that is necessary or even makes sense.

As for rumbling, sorry I can't help with that. A mild chill in the air shouldn't cause that with any vehicle. Hell, that's not even normal with the temperatures we have up here. I really don't think it's temperature related, and if you want to talk about cold weather driving, I'm your guy. (not that you're driving in the cold - you're not). And, no, -2c will not affect the shift points in your transmission. My coworkers and I had a good laugh about that. (again, sorry, eh?)

 

[KCRoadrash]

My 2022 Eco started making a rattling noise when the weather got cold (under 10 degrees F). I traced the problem to 2 metal prongs that are attached to the exhaust pipe and touch a metal support brace as it exits the engine and curves under the truck. The engine runs slightly more roughly when its that cold and causes a rattle from the 2 prongs hitting the support brace that can be heard inside the cab. I insulated the metal prongs where it hits the support brace with 2 small pieces of heater hose. That solved the rattle problem. Also, the prongs do not appear to get hot enough to melt the hose.

 

[CarbonGrayFX4]

On my way to driver license office, cold 27 deg morning, driving 40 mph on smooth blacktop, could sorta hear and feel a hum/rumble. Huh, what is this? Let up gas, it disappeared. Step on gas, kinda feel, hear it. I wear a hearing aid, so any sound questionable. But feel it. I do hard acceleration it seems to quieten a bit, until reach a steady speed, around 40 mph.

Cabin cold, so had heater blower at maybe 50% speed. Thinking maybe the blower humming, shaking a bit? Adjusting blower speed didn’t seem make any difference. Adjust duct from both top vent and floor, to just top vent made no difference .

At a stop light, on go, trying to ascertain if tranny cold, playing its shift points. Seems when training shifts from low to 2nd, 3rd + as truck speeds, the hum, vibes crop up.

So, parked, sitting a bit, thinking a heat soak might make difference warming thing up. Driving home, ambient now 31 deg, still make, feel that hum/vibe feel.

No CEL or warning crops up. At home, pop hood to check, engine idling , nothing unusual then.

Could it be tires? It’s warming up over next few days, intend to drive over same blacktop, see what happens.

My question to others out there, ever experienced similar situation?

And truck just turned 5,001 miles.

Based on your description I think I have noticed the same noise. It seems to be RPM dependent and most noticeable at 32 deg. and below.. I notice it most at 2k. Increasing rpm seems to make the hum disappear, decreasing seems to make it lessen. I'm assuming it is just some kind of engine resonance and nothing to worry about. I bought my 2024 in October and currently sit at 11,000 miles. It runs great but is anything but quiet due to lack of sound dampening in the XLT trim.

 

[CarbonGrayFX4]

My 2022 Eco started making a rattling noise when the weather got cold (under 10 degrees F). I traced the problem to 2 metal prongs that are attached to the exhaust pipe and touch a metal support brace as it exits the engine and curves under the truck. The engine runs slightly more roughly when its that cold and causes a rattle from the 2 prongs hitting the support brace that can be heard inside the cab. I insulated the metal prongs where it hits the support brace with 2 small pieces of heater hose. That solved the rattle problem. Also, the prongs do not appear to get hot enough to melt the hose.

Interesting, I am going to do that, as well. The 2.0 Ecoboost makes so many noises it's hard to tell where they are all coming from lol.

 

[Gray Goose]

Nothing urgent to worry about. Cold causes various materials to contract at different rates resulting in all sorts of strange noises. Tires can sound different on frozen roads and reduced inflation pressure due to the cold.

For anything serious, hard acceleration typically makes a noise worse, not better.
If the noise continues or get worse over time, then there might be an issue to have checked out.

I'm sure mine has been making all sorts of strange noises. From decades of driving in the cold, my ears have trained to filter it out.

Edit: Or I'm just getting older and my hearing is not as good anymore.

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