# Grinding sound at low speed **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** brakes\ **Created:** [April 15, 2009, 1:50pm UTC](https://community.cartalk.com/t/grinding-sound-at-low-speed/29175 "2009-04-15T13:50:52Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![kathena](https://avatars.discourse-cdn.com/v4/letter/k/53a042/32.png) [@kathena](https://community.cartalk.com/u/kathena)\ **Post date:** [April 15, 2009, 1:50pm UTC](https://community.cartalk.com/t/grinding-sound-at-low-speed/29175/1 "2009-04-15T13:50:52Z")
While on a road trip, my car started making a loud grinding sound (low pitch) when I slow down, even if the brakes are not applied. At 2 different instances (luckily close to home) the brakes actually seemed to fail - my foot went all the way to the ground with no response. I’m not sure if related, but my "service 4wd light goes on periodically and the last time I was in 4wd it took some time to get out of 4wd - it wasn’t responding to the 2Hi button. The car is a 2001 Chevy Blazer with about 160K miles. ---
**Author:** ![kathena](https://avatars.discourse-cdn.com/v4/letter/k/53a042/32.png) [@kathena](https://community.cartalk.com/u/kathena)\ **Post date:** [April 15, 2009, 2:05pm UTC](https://community.cartalk.com/t/grinding-sound-at-low-speed/29175/2 "2009-04-15T14:05:57Z")
The sound is there on acceleration also and seems to go away at higher speeds (maybe over 15-20). ---
**Author:** ![mcparadise](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mcparadise/32/32_2.png) [@mcparadise](https://community.cartalk.com/u/mcparadise)\ **Post date:** [April 15, 2009, 2:12pm UTC](https://community.cartalk.com/t/grinding-sound-at-low-speed/29175/3 "2009-04-15T14:12:40Z")
Take this vehicle to a mechanic NOW. Brake problems are nothing to fool with. If the brake pedal goes to the floor you shouldn’t even be driving. Have it towed.