Rear Brakes "Seizing" when parked over 4hrs

[FraserC]

I will add another dimension, in general rusting rotors on EV's varies a lot due to type of driver usage. If you are a driver who uses max regen, then the foot brake gets used extremely rarely.. The opposite rubs the pads/rotors much more per mile. If even a very thin layer of rust can remain on your rotors, then the best solution (mentioned above) is to hard brake with the footbrake every few days or so. This will polish the rust off somewhat on the rotor and the pads.
I've done rotor replacements on quite a few hybrids for this reason!

Sponsored

 

[Tuggles]

Mine also does this, also extremely loud. Talked to SC about it when I was there and they said nothing to worry about. The rep said that occasionally using the brakes a bit more (vs. just regen braking) might help this a bit.

 

[R1Thor]

Just chiming in to respond: mine's been doing this for years at this point. Especially after particularly wet driving. I'm just accustomed to it. It's annoying (loud), sure, and occasionally jarring if you're not anticipating it. But that's all it's been so far. No excessive wear or any damage caused from it insofar as I can tell (I check my pads every time I rotate my tires--they're all pretty much untouched and I'm over 50,000 miles).

 

[1stPlace]

Just chiming in to respond: mine's been doing this for years at this point. Especially after particularly wet driving. I'm just accustomed to it. It's annoying (loud), sure, and occasionally jarring if you're not anticipating it. But that's all it's been so far. No excessive wear or any damage caused from it insofar as I can tell (I check my pads every time I rotate my tires--they're all pretty much untouched and I'm over 50,000 miles).

This is my experience as well. Normal behavior according to the service center, and my last comprehensive inspection at 60k miles did not show any concerns. You eventually accept it. It may be a loud issue, but it is in the grand scheme of things, a small issue.

 

[ebellinder2]

Truck has been having ANOTHER issue lately. I thought it was water in the rear calipers freezing, but it's been above freezing for 2 days now and it's still doing it. It sounds like the rear pads are rusting to the rotors. Something is "clunking" VERY loudly the very first time I move the truck after it has sat for ~4hrs or longer.

oldest took a video this morning. The noise happens at 0:04 in the video. The other "crunchy" sounds are the tires rolling over the ice outside the garage. Also, ignore the very "country" sounding 14yr old in the beginning

https://photos.app.goo.gl/uwHfwVgqFZMRHbym8

Once the truck moves for the first time, it's nice and smooth. Some slight grinding from the brakes on the first stop, but that's only after it's been wet (I ran it through the car wash last night), and that's understandable and tracks with previous vehicles.

This loud "clunk" though is really bad. Anyone have any thoughts?

My T does the same thing especially if I have washed it recently. It’s the parking brake/ brake hold system but not necessarily a problem. My Tesla will do this occasionally especially if I just washed it

 

[LivingInKaos]

Yep, moisture causing corrosion on the rotor making them "stick". When comparing this to other vehicles, you have to keep in mind how LARGE the Rivian brake pads are. There's much more to friction, so breaking it loose will take that much more effort.

Don't sweat the noise. It's seasonal and situational. I park outside 24/7 so it's been pretty prominent over my past 3-3/4 years.

 

[rlloz]

This is my experience as well. Normal behavior according to the service center, and my last comprehensive inspection at 60k miles did not show any concerns. You eventually accept it. It may be a loud issue, but it is in the grand scheme of things, a small issue.

one member mentioned that moving forward few feet first then reverse to back up. I find this helps eliminate that irritating clunking sound

 

[jrmbadger]

I've fixed it mostly by just using the brakes a few times during the drive.

Sponsored