Cryogenically treated rotors
#11
My experience in almost 400,000 miles in 2 HHR LTs has been it's not the rotors.
It has been: bad lower control arm bushings, bad struts, bad shocks and poorly adjusted rear drum brakes.
As I understand, and could be wrong, the rear disc brakes are adjusted by routinely using the ebrake.
It has been: bad lower control arm bushings, bad struts, bad shocks and poorly adjusted rear drum brakes.
As I understand, and could be wrong, the rear disc brakes are adjusted by routinely using the ebrake.
#12
My experience in almost 400,000 miles in 2 HHR LTs has been it's not the rotors.
It has been: bad lower control arm bushings, bad struts, bad shocks and poorly adjusted rear drum brakes.
As I understand, and could be wrong, the rear disc brakes are adjusted by routinely using the ebrake.
It has been: bad lower control arm bushings, bad struts, bad shocks and poorly adjusted rear drum brakes.
As I understand, and could be wrong, the rear disc brakes are adjusted by routinely using the ebrake.
#13
I forgot to add hubs to the list.
If the struts have over about 70,000 miles on them probably worn out. Leaks, bottoming out, odd cupping wear on tires. Same as shocks.
And semi metallic pads eat rotors up.
If the struts have over about 70,000 miles on them probably worn out. Leaks, bottoming out, odd cupping wear on tires. Same as shocks.
And semi metallic pads eat rotors up.
#14
As Donbrew said, I would look at the hubs. If they're not running true, you will destroy a set of rotors with-in 3,000-5,000 miles.
The following articles may be some good tech info for your situation:
Pro-Cut OEM History | Pro-Cut On Car Brake Lathes
Pro Cut Lathe - EBC Brakes
Brake Pulsation Questions, Rotors, DTV
Stop Brake Pulsation Before It Starts, Correct Runout
How To Solve Brake Vibration Permanently - EBC Brakes
By the way, this isn't a commercial for EBC, but all of these links were suggested/referenced by an EBC engineer I was working with.
Thanks,
Ken
The following articles may be some good tech info for your situation:
Pro-Cut OEM History | Pro-Cut On Car Brake Lathes
Pro Cut Lathe - EBC Brakes
Brake Pulsation Questions, Rotors, DTV
Stop Brake Pulsation Before It Starts, Correct Runout
How To Solve Brake Vibration Permanently - EBC Brakes
By the way, this isn't a commercial for EBC, but all of these links were suggested/referenced by an EBC engineer I was working with.
Thanks,
Ken
#15
like donbrew said it may be the LCA, but the rear bushing that i believe is somewhat hidden from view is the culprit. I recently changed my pads and front rotors and it did NOTHING to the brake judder i have. it is all in the LCA's as mine goes. i recently put on a TTR motor mount and to be honest it has helped with the judder too.
#16
The only reason I was thinking it's truly brake related is because he said it goes away when he installs pads and rotors (then comes back a few K miles later).
If it weren't brake related, changing the pads and rotors shouldn't fix anything, correct?
If it weren't brake related, changing the pads and rotors shouldn't fix anything, correct?
#17
Each of the things I listed solved my judder for a while.
More questions to pose: Is the PEDAL actually moving? Or the brakes shaking the car? Or the ABS activating?
Many times people say "pedal pulsation" when they really mean "brake pulsation". It is hard for us to tell which over the interwebs.
More questions to pose: Is the PEDAL actually moving? Or the brakes shaking the car? Or the ABS activating?
Many times people say "pedal pulsation" when they really mean "brake pulsation". It is hard for us to tell which over the interwebs.
#18
Each of the things I listed solved my judder for a while.
More questions to pose: Is the PEDAL actually moving? Or the brakes shaking the car? Or the ABS activating?
Many times people say "pedal pulsation" when they really mean "brake pulsation". It is hard for us to tell which over the interwebs.
More questions to pose: Is the PEDAL actually moving? Or the brakes shaking the car? Or the ABS activating?
Many times people say "pedal pulsation" when they really mean "brake pulsation". It is hard for us to tell which over the interwebs.
#20
There are a few long discussions about rotor warp and the "bedding" of pads. Way too many for me to list here. Give the SEARCH a shot, try different search phrases.