Brakes Squeal

[Nailit]

Does anyone else exerience brakes squeel in reverse? Mine seems to do it mostly after it has sat for a while. I only notice it in reverse.

Yes! Most irritating!! I thought it was because of all the rain we were having
, but thats not the case.

 

[ultane]

Outside of an F-Series, I would agree with that. But, one is limited when it comes to full size trucks. It's funny because I have a LC, my neighbor has a GX550, and my other neighbor has a Lincoln Aviator.

When Ford was in the red for a couple of years, the new CFO said that he would fix Ford over night. He did. Simply by denying customers warranty repairs. My brand new 2015 transit 350 windshield wipers would intermittently and unpredictably simply not work. No dealer could/would fix them. When handles started falling off, they refused to repair them, despite the ford bumper to bumper extended warranty. I could go on..

 

[Rolly]

Does anyone else exerience brakes squeel in reverse? Mine seems to do it mostly after it has sat for a while. I only notice it in reverse.

Bought mine last March. Around May, I started hearing the brakes squeaking everytime I backed up. I just brought it to the dealer this morning (Monday, 6/30/2025). The desk guy told me it's normal for high performance brakes, and I bluntly told him that's not acceptable for a $80k worth of a vehicle. The squeaking is extremely annoying and frustrating specially around people in the parking lot staring at me when they heard the squeaking. I told him I have 2021 Tacoma I bought new in late 2020, and I never heard the brakes squeaking.

 

[D-mac]

A stainless spring steel shim may help alleviate the non-100% bleed off of the hydraulic pressure due to……. when it cools, it’ll shrink slightly and allow more space between the pad and the rotor.

Just my theory tho’

I'm considering reinstalling the OEM pads and shims with some fresh brake grease to see if that takes care of the problem for few dollars. I suspect ceramic pads will not squeal either, based on past experiences..

 

[bluebullet]

I'm considering reinstalling the OEM pads and shims with some fresh brake grease to see if that takes care of the problem for few dollars. I suspect ceramic pads will not squeal either, based on past experiences..

I made the call to Toyota Brand Engagement. They gave me a case # which will be sent to my servicing dealership as well. Analyst was polite and knew nothing of the issue. She did her job, and I am now counted among the lost. I had previously reported the problem to the NTSB. Problem was reported to dealership at 5K mile oil change. They could not replicate the problem. Where have I heard that before? I am now at 9563 miles with the brake squeal in reverse. I did tell the analyst that a TSB had been issued for Lexus vehicles. Crickets. Time will tell if Toyota stands behind their products. My floor mats do not slip.

 

[Winchester44]

I made the call to Toyota Brand Engagement. They gave me a case # which will be sent to my servicing dealership as well. Analyst was polite and knew nothing of the issue. She did her job, and I am now counted among the lost. I had previously reported the problem to the NTSB. Problem was reported to dealership at 5K mile oil change. They could not replicate the problem. Where have I heard that before? I am now at 9563 miles with the brake squeal in reverse. I did tell the analyst that a TSB had been issued for Lexus vehicles. Crickets. Time will tell if Toyota stands behind their products. My floor mats do not slip.

Same here calls to Toyota Brand engagement was a total waste of time. They admitted there’s nothing they can do.

 

[Winchester44]

My thought is the caliper mounting surface is slightly canted (couple of thousandths) on the forward edge. This would cause the pads to wear slightly more on the front edge vs the rear edge.

When you stop with your foot on the brake and put it in park, the pads are squeezed against the rotor and come to rest. This is a substantial amount of hydraulic pressure, normally when you remove your foot off the brake the residual hydraulic press bleeds off and the “barrel” side pad retracts slightly, removing the “pinch”.

Since there is an electrical parking/hold function I believe that system’s not allowing residual pressure to 100% bleed off (even tho’ you didn’t press the button). Those couple of thousandths difference between the front and back edges of the pads are creating a knife edge against the rotor at the rear of the pads and when you back up, that knife edge is scraping the rotor creating the horrific sound until you put it in drive and release the brake (I keep my foot on the brake when in reverse). The rotation of the rotor with no brake applied will naturally realign the pads to the same plane as the rotor and the sound goes away.

By backing into my parking spot and when departing the next morning, my foot is on the brake, shift into drive, release the brake and the rotor immediately starts rotating, thus realigning the pads (knife edge no longer making contact) and in my case …… no horrific sound.

A stainless spring steel shim may help alleviate the non-100% bleed off of the hydraulic pressure due to……. when it cools, it’ll shrink slightly and allow more space between the pad and the rotor.

Just my theory tho’

Interesting video.

 

[ultane]

I had previously reported the problem to the NTSB.

Maybe we should all pursue this option. (?)