We had been dealing with a rumble in the brakes for a while and I finally ordered rear pads and rotors as a kit from Amazon.

https://www.amazon.com/dp/B07CQP7L25?...

The rear rotors were warped which is what was causing the rumble. Think about a record on a record player which has a wave to it. Same concept with brake rotors being squeezed by the pads at high speed which caused the rumble or shake.

We still need to flush the brake fluid but that will be a project for another day.

Thanks for watching!