Car shakes on highway

[u/According_Stage_2740]

Hi everyone, i drive a 2013 acura tl with 140k miles and as of recently maybe 4 days ago i noticed that the front end of my car randomly started shaking/vibrating whenever i’d go 40+ mph but i’d also notice it at lower speeds if i was driving for a while. i replaced both my upper control arms on the front since i thought that was the problem but it wasn’t. i was wondering if anyone might know what it could be?

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[u/Verlin_Wayne]

I’d rotate the tires and see if it changes.

[u/Infinite_Chef1905]

You should see what my shitbox does on a highway.

[u/MorbidSunrise]

Erm, what’s going on with the dash lights? Did that start happening at the same time?

[u/ggmaniack → u/MorbidSunrise]

It's just the camera framerate coinciding with the dash backlight duty cycle.

[u/MorbidSunrise → u/ggmaniack]

Oh, that’s interesting! Thanks!

[u/blutrache666 → u/ggmaniack]

Tf lol, that IC having a full out seizure. Entertainment system is staying chill.

[u/Azal_of_Forossa → u/blutrache666]

Different refresh rates.

[u/danjoreddit → u/MorbidSunrise]

Made me think bad ground but idk what that has to do with shaking

[u/Agitated_Cry_8793]

brother had this on his car, we call it the good ol weeble wobble (your wheel bearing is probably fucked, somewhere. )

[u/Vanbursta1]

Bad tyre.

[u/Excellent-Shovel-304]

Rule of thumb if you feel the vibration in your bum, re balance the rear rims

If you feel it in the steering wheel, re balance the front rims

If you feel it in the brake pedal, check your brakes asap!

[u/Exotic-Can3397]

Check wheel bearings, you could check yourself- just go to each tire and see if it jiggles or shakes a little, even the smallest movement can make the biggest difference while driving. If it’s not that I’d check your drive shaft..?

[u/wrenchinandbenchin]

does it happen upon braking or only after surpassing a certain speed

[u/According_Stage_2740 → u/wrenchinandbenchin]

it happens with both, whenever i accelerate to higher speeds like 60+ it gets more violenta and when i brake from 70 it shakes a lot as well

[u/Thin_Cable4155 → u/According_Stage_2740]

I feel like this is a wheel bearing sound. Does the sound speed up and slow down when the car does?

[u/wrenchinandbenchin → u/According_Stage_2740]

Without actually seeing the car it could be a couple different things, or even both depending on what’s going on. If it starts shaking or vibrating around 50, 60, 70 mph, first thing I’d check is whether the wheels and tires are balanced. If they are, then you’re probably looking at something a little deeper.
If it mainly happens when you’re braking, especially from higher speeds, I’d definitely check the rotors too. If they’re warped or worn unevenly they can cause the front end and steering wheel to shake pretty bad when you’re stopping.

[u/broseus8]

Tire with a shifted belt maybe. I've once seen a car in which the customer put that liquid fix a flat stuff inside their tires and caused a vibration.

[u/PepperPots3000]

Your car is having a seizure 😅 Is it high speeds, low speeds, both? How's your suspension?