Rear Brake Drum Judder

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Whats cause this? When I pull up the parking brake while moving, I'm getting a judder from the rear drum brakes. I just replaced the drums, thinking they were warped, but the judder is still there. This pertains to the Honda in my signature. Thanks in advance.
 
Why would you apply the "parking" brake while you're moving? Hint: it's designed for being applied after the vehicle is stopped.

If you feel the need to apply brakes while the car is moving, just press on the pedal just to the left of the gas pedal.
 
Emergency brakes are out of round....if it's not doing it during regular driving, no worries.
 
Originally Posted By: Pop_Rivit
Why would you apply the "parking" brake while you're moving? Hint: it's designed for being applied after the vehicle is stopped.


Well it depends....if you have combination of disc/drum system it is better to apply parking brake from time to time to get rid of rust inside the drum

To the opener of the thread...probably you have that system (D/D) and you dont know that...send your rear discs to machinist to resurface your drums...
 
Pulling the parking brake gently at low speeds is a good way to see if the rear drums are out of round. Possible the new drums you bought aren't true.
 
Originally Posted By: mehullica
Pulling the parking brake gently at low speeds is a good way to see if the rear drums are out of round. Possible the new drums you bought aren't true.

+1. A lot of aftermarket drums, when new, will require turning. The rotors are usually fine though.
 
Originally Posted By: Pop_Rivit
Why would you apply the "parking" brake while you're moving? Hint: it's designed for being applied after the vehicle is stopped.

If you feel the need to apply brakes while the car is moving, just press on the pedal just to the left of the gas pedal.


To clarify, I only pull on the parking brake when moving to see if the judder is coming from the front or rear brakes. The judder is definitely from the rear brakes.
 
Originally Posted By: mehullica
Pulling the parking brake gently at low speeds is a good way to see if the rear drums are out of round. Possible the new drums you bought aren't true.


Wow, I used Bendix drums and they claim that they are "Machined, balanced, and ready to install". You think they need to be turned? That would be a great disappointment.
 
I've seen several aftermarket rotors/drums with run out issues. Aftermarket rotors/drums with less or too thin cooling fins than OEM causing problems down the road
 
Update: Rear brakes started to slightly squeak, so I took a chance with Lubegard squeak relief. I sprayed a light coat around the drum's friction surface, and no more squeaking; that's been a few weeks now, so let's see how long it lasts.
 
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