It's possible or even likely the pads are seizing on the pins (really don't like this design) so when you stomp on the brakes the pads don't retract normally causing the non linear pedal feel. Also possible the calipers are seizing but not common. You should not be able to lock the brakes that's what ABS is for. But if the calipers/pads are not working correctly it can't modulate pad pressure correctly.

Don't know about your other questions.

 

I let go as soon as I heard the tire sound so not sure if it was completely locked up. I'll try the same in the sand to see if my ABS is actually working. The release feels fine. It's just when I stomp on the brake, sometimes it brakes fine, but sometimes it brakes super hard to make the front dive into the road. You don't have this issue with the gx?

 

Sounds like you are talking about Brake Assist.
@1:50

 

The wheels should never lock (to be clear they may very briefly). Does the GX have brake assist?

 

I’m thinking brake assist as well

Brakes are electro/hydraulic and not vacuum based on GX

 

thanks guys! yes! it's definitely brake assist. I suppose it's a feature? is there a way to turn it off?

 

nevermind. the brake assist is a life saver when towing a trailer. it is a nuance when driving without one but that extra braking really came in handy when i was towing a cargo trailer and a guy wanted to make a left as i was entering the intersection at the speed limit. really slowed the car down significantly.

 

My 2023 GX460 just had it's first oil change at 1K miles, only had it for 2 months. I started to notice a noise whenever I press the brakes while driving.

See video attachment.

Buzzes for a long time on cold starts, doesn't buzz on warm starts but buzzes 1 out of 3 brake pushes. I've seen mixed reviews on YouTube from "It's normal" to "Needs new brake booster accumulator" to "master cylinder replacement".

First, it doesn't make a noise when idle, only on cold starts and ever 3rd brake push. So I guess my question is, is it suppose to buzz that often?

And second, if it's normal, how come not all GX have this noise?

 

anyway to reduce that brake travel in the pedal before it starts to brake on 10-13 models?

and

my rear brakes keep making a grinding noise. i did replace the oem's with remans after they failed.
had a mechanic take a look at this and they replaced the hardware, but it still making the noise

 

Not aware of brake travel adjustment.

What did they say about the parking brake hardware? Those exist as parking shoes within the disc brake assembly



https://www.clublexus.com/forums/gx-...l#post10483972

 

they said it looked fine and just adjusted the cable, initially its nice and tight and holds the vehicle in place, but after approximately 10 times it starts the loosen up and eventually it'll stop holding the car in place on any incline.

 

I’d be concerned they only adjusted the cable and not the shoe adjusters. Adjusting the cable assumes all is set fine in with “each” parking brake shoe” and you still have some extra slack in the cable to take the slop out of .

 

understood, my search for a competent mechanic continues.

 

Went in for my free tire rotation and balance at discount tire today. Took a quick look at the brake pads and going to change soon.

My question to the group is what mm thickness is the right time to change before the wear indicator hits the rotor.

I have powerstop pads and rotors ready to go. Last trip to dealer not long ago said 6mm and 4mm left about 4 months and 4,000 miles ago. Probably less pad material now per my eye calipers (just guessing though).

Is it worth using the factory rotors again (and/or resurfacing at o’reilly auto parts etc). Don’t want to be wasteful if the factory rotors are good for 2 pad cycles.

I’m feeling a little lazy after doing all kinds of fluid changes for 55k to 60k service interval. And it’s frickin hot out🔥🔥

 

^ I never ever resurface ... not worth the minimal savings ... always induces stress that relieves with braking (heat cycles) where the rotors quickly warp ...