If you're hearing a grinding noise while driving but not brakes applied, it could indicate several issues beyond the braking system. Here are a few possible causes:

1. Worn-out wheel bearings: When wheel bearings wear down, they can create a grinding noise. If left unchecked, it could lead to more severe damage.

2. Faulty CV joints: The constant velocity (CV) joints transfer power from the engine to the wheels. If they wear out or get damaged, they can produce a grinding sound when driving.

3. Transmission problems: A grinding noise could also signal an issue with your transmission. Low or dirty fluid could cause internal parts to grind.

If you're hearing this noise, it's crucial to have your car inspected by a professional to prevent further damage - https://www.motorglo.com/squea....king-noise-while-dri