Brakes or transmission?

Orion335 · 04-09-2018, 08:21 PM

When I decelerate to a stop from about 20mph, I hear a groaning noise coming from the car. Can't tell if it's the brakes giving out, or maybe something from the drivetrain? Wasn't going on when I brought it to the dealership for service. Also feel some "vibration" in the pedal when decelerating hard from about 50mph. Rotors might need resurfacing? Car says pads are still good.

Billfitz · 04-09-2018, 09:12 PM

I'd have the pads checked to be sure there's sufficient lube between them and the pad carrier. Don't trust the wear indicator, at best it's an educated guess. Read about my experience with ungreased pads here:
http://f30.bimmerpost.com/forums/sho....php?t=1471617

Pedal vibration may be just the ABS at work.

oceanview · 04-10-2018, 08:17 AM

Quote:

Originally Posted by Orion335

When I decelerate to a stop from about 20mph, I hear a groaning noise coming from the car. Can't tell if it's the brakes giving out, or maybe something from the drivetrain? Wasn't going on when I brought it to the dealership for service. Also feel some "vibration" in the pedal when decelerating hard from about 50mph. Rotors might need resurfacing? Car says pads are still good.

Bring it to stop using the handbrake/emergency brake instead of using the pedal.
If you hear the same noise it's not coming from the brake rotor/pads.

Orion335 · 04-11-2018, 02:30 PM

Quote:

Originally Posted by oceanview

Bring it to stop using the handbrake/emergency brake instead of using the pedal.
If you hear the same noise it's not coming from the brake rotor/pads.

good idea

EDWYER · 04-15-2018, 09:06 PM

Also depending on your cars mileage check your thrust rods.

04-09-2018, 08:21 PM	#1
Orion335 Private 18 Rep 71 Posts Drives: 335i Join Date: Jun 2017 Location: Ca. iTrader: (0)	Brakes or transmission? When I decelerate to a stop from about 20mph, I hear a groaning noise coming from the car. Can't tell if it's the brakes giving out, or maybe something from the drivetrain? Wasn't going on when I brought it to the dealership for service. Also feel some "vibration" in the pedal when decelerating hard from about 50mph. Rotors might need resurfacing? Car says pads are still good.
	Appreciate 0 Tweet Quote

04-09-2018, 09:12 PM	#2
Billfitz Lieutenant General 8245 Rep 16,087 Posts Drives: '15 328iX GT Join Date: Jan 2015 Location: New Hampshire iTrader: (0)	I'd have the pads checked to be sure there's sufficient lube between them and the pad carrier. Don't trust the wear indicator, at best it's an educated guess. Read about my experience with ungreased pads here: http://f30.bimmerpost.com/forums/sho....php?t=1471617 Pedal vibration may be just the ABS at work.
	Appreciate 0 Quote

04-15-2018, 09:06 PM	#5
EDWYER Yoda of mods 1674 Rep 3,006 Posts Drives: X5 RWD Join Date: Feb 2018 Location: NC iTrader: (40) Garage List 2015 X5 RWD [0.00] 2016 BMW M2 [10.00]	Also depending on your cars mileage check your thrust rods.
	Appreciate 0 Quote