Problem while braking downhill

Maintenance/Repairs
1

I am here with another question

Civic (european version) sedan 2010 80k miles.

I have a situation which s been going on for long time and it only gets worse. Couple of mechanics seen it and i trust my guy however no solution:

While driving downhill if you apply brakes, the car doesnt really shake strong until you press the pedal stronger but there is loud noise and brakea dont perform well. If you press the pedal tougher it will get super loud. This sound is hard to explain but what i can tell you is: if ywashing machine comes close to the end rolling like mad cow, sometimes machine starts to move and you hear this crazy noise its similar to that. The worst part of it is that the brakes dont hold well when this happens. Especially when you need to come close to a stop car shakes like a tiger tank and barke performance got worse at leasy 2-3x than standard ( nothing on pedal or steeering)

It happens when you are a bit faster if you do more than 40 mph , faster gets worse.

I know that you shouldnt brake while going downhill fast but i live in a place where we jave many small mountains and intercity road so its unavoidable.

I have changed everything and no help: pads and rotors, rear left caliper was sticking along with blocked brake line, both were changed. Brake fluid changed. None of them helped.

What else can i look at?

2

Did you replace the brake components with those that meet or exceed the OEM specifications?

Tester

1 Like
3

Check the suspension bushings. Especially the ones that keep the wheels from moving front to back.

A bad bushing will allow a resonant vibration to occur under braking like a warped rotor. That vibration may cause the wheel to hop reducing the effectiveness of the brakes.

Also take a good look at the engine mountings for the same reasons.

2 Likes
4

If you have ABS, pull the fuse and test brakes. Find a safe place and do it slowly at first. Before that, have someone step on the brake and watch the brake booster and listen to it. If you hear it leaking or it moves around there may be a problem with it. That never works but I’m looking for something odd. Broken strut? As always; get rid of it before it gets rid of you.