Hum Noise Hihgway Speeds 60 + MPH

[Musclez]

Good Afternoon Forum members.

 

I have a 2015 TC Cargo in great shape. Did a trans about 6 months back no issues thank fully. Any who I have an odd hum / noise echoing sound in my brain after 60 mph.

 

I don't think its anything with the driveline, had the wheel bearings checked, CVs trans axles all appear good no issues with CV boots or joints.

 

Trying to pin point what it could be, its not tires or wheels just did new tires and wheels are straight and true. 

 

Any insights would be helpful as driving it for extended periods makes my bottle of Advil disappear. 

[windguy]

Sorry to hear about your noise issues. Must be frustrating. We certainly don't want you to turn into an Advil junkie for your kidney's sake. 

I have no idea but can certainly ask some questions that come to mind.

 

BTW, If you take @JackGrimshaw advice for noise abatement, put a ladder rack on the roof and the echoing noise will be solved 😜

 

I too have a 2015 Cargo but relatively low miles to yours I'm sure, only 36,000.

 

If you let off the gas at 60+ when you hear the hum noise, does it continue to hum until you drop below 60?

 

Before the new tires, no hum noise? If true, then why are you eliminating the tires as a noise source?

What tires did you put on vs what did you have before? 

What tire pressure are you running?

Have you tried varying the tire pressure to eliminate that issue?

 

[Musclez]

Hello Issue was the same prior to tires change. Using cross climate 2s

Pressure is good stock spec. 
Below 60 noise non existent. 

[Double Nickels]

21 hours ago, windguy said:

put a ladder rack on the roof

 

 

 

 

[Musclez]

I have a ladder rack and no issues from that. I hear the noise whiling running it on a lift. 

[windguy]

The ladder rack suggestion was for humor, as offered by other forumite in another post re van interior noise.

 

Sounds like you've done more extensive testing than originally offered. Eg. testing on a lift at speed.

That's a really good idea and I'm surprised you couldn't pinpoint the source better.

 

This reminds me of a problem I had with an 1988 GMC S15 pickup. Midyear GMC added a new 4.3L engine.

The truck would have a resonance sound that started at around 45-50mph as I recall.

GMC issued a workaround by drilling some holes in the engine cowling, which the dealer did.

It solved the noise problem. Perhaps your problem is something similar.

 

Motor mounts okay?

Any other bushings used for isolating noise and vibration?

 

Good luck!

 

 

 

[Musclez]

Mounts are fine nothing looks deteriorated or otherwise. did sway bar end links that's it. 

Edited September 18, 2025 by Musclez

[windguy]

There are some skilled mechanic guys on this forum. Hopefully they will chime in with some thoughts.

The forum traffic has been slow for a while now so it make take some time before you get a response.

 

[Fifty150]

On 9/15/2025 at 2:35 PM, Musclez said:

I have an odd hum / noise echoing sound in my brain

 

 

 

 

8 hours ago, windguy said:

There are some skilled mechanic guys on this forum

 

 

 

 

No amount of wrench turning could fix a hum in his brain.

[G B L]

On 9/17/2025 at 11:05 AM, Musclez said:

I hear the noise whiling running it on a lift. 

Did you walk around under it while it was on the lift?   It had to be from the drive line.  was some one in the car to change the speed and gears ? 

To check the brain hum put some Muffs on!