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Discussion Starter #1
OK, heres the deal. Have an 08 DC still under warranty. Recently I discovered that during a normal stop, while holding the brakes, the pedal will gradually go to the floor. Well my previous Tundra did the same thing and I had to change out the master cylinder. Every vehicle I've ever had that displayed this symptom usually had a defective master cylinder. So I make an appointment at my local dealership to have the truck worked on. After explaining the problem I leave it and go home. Shorlty I get a call that my truck is ready. Then the caller tell me that there was no problem with the brakes and that this is "normal" on all Toyotas. I tell him that I can't accept that and that I will pick up the truck and contact Toyota. Then he wants me to talk to the mechanic. I talked with him on the phone and he explains that he cant duplicate the problem. I'm not too impressed because I have to explain how you start the engine and step on the big pedal and in about 15 seconds the pedal will be on the floor. Then he starts to tell me how this is normal. Anyway I explain to him that before I left the truck for work I had the parts dept order in a MC because I was sure it was a defective MC. He then says he will have to ask his manager about this. A few minutes later the adviser calls me back and says the MC is going to be replaced. Now my question is has anybody experienced this and how could this be called "normal" brakes. Why would you design a brake system for the pedal to go to the floor?
 

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Let us know how it goes after they replace your MC. Pedal should not sink to the floor.
 

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I just recently noticed a similar issue, Mine does not go all the way to the floor, but I can feel it going down some after Im stopped. My pedal is noticeably softer and there is more travel than there was a few weeks ago. I can pump them and get some firm pressure back. I cant find any leaks. -Gonna have the dealer look at this with my gas pedal fix.
 

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Why would you design a brake system for the pedal to go to the floor?
it is so the gas pedal that accelerates on its own doesnt feel rejected.
 

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Engine speed can affect the brake pedal feel due to the vacuum varying to the booster i.e. when the ac/defrost kicks in and out.

I do admit the brake pedal feel on these trucks is rather soft, but I've never had an issue with the pedal going all the way down to the floor.
 

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Discussion Starter #6
Engine speed can affect the brake pedal feel due to the vacuum varying to the booster i.e. when the ac/defrost kicks in and out.

I do admit the brake pedal feel on these trucks is rather soft, but I've never had an issue with the pedal going all the way down to the floor.
Well see, you better get to the dealership, cause yours is not "normal". None of this makes any sense. First they say a falling pedal is normal. Then since they could not duplicate the problem I guess mine is not normal and still didn't want to fix it. So I guess what they mean is that whatever mine is doing it is all "normal". Seems they have an explanation for any situation. Its all good. Just as long as they replace the master cylinder I'll get on down the road. Seems they didn't want me to contact Toyota about my "normal" brake pedal that goes to the floor.
 

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Well see, you better get to the dealership, cause yours is not "normal". None of this makes any sense. First they say a falling pedal is normal. Then since they could not duplicate the problem I guess mine is not normal and still didn't want to fix it. So I guess what they mean is that whatever mine is doing it is all "normal". Seems they have an explanation for any situation. Its all good. Just as long as they replace the master cylinder I'll get on down the road. Seems they didn't want me to contact Toyota about my "normal" brake pedal that goes to the floor.
I've driven a few other Tundras and the brakes all pretty much feel the same as mine. I just think there's a lot of power assist. Don't get me wrong, the brakes work well. It's just the pedal feeling softer than what I'm used to from other vehicles.
 

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Discussion Starter #8
I've driven a few other Tundras and the brakes all pretty much feel the same as mine. I just think there's a lot of power assist. Don't get me wrong, the brakes work well. It's just the pedal feeling softer than what I'm used to from other vehicles.
I was just messin with you. Normal to these people I guess is when the pedal hits the firewall.
 

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Discussion Starter #9
Got my truck back. Now my brakes are like they should have been. Surprise, surprise, they found that the MC was leaking internally. Golly thats are a real shocker. Guess they would say mine are "abnormal" now that the pedal doesnt hit the firewall anymore.
 

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i paid attention to mine on the drive to work...yes, as stated by thumbs up there, the brakes will feel different based on engine speed, etc...but not enough to cause any alarm. i felt my AC compressor kick in....pedal feel really doesnt change that much i only notice it because if i am lightly resting on the pedal the truck might start to inch fwd right when it cycles...no biggie...i even tried to make mine go to the floor...but nope...but i also agree it is a little softer than i would have expected..im used to the german feel in the wifes car and my old corvette...

but...that said...i do know what u are talking about when the MC does go...i had an old chevy truck in HS and i would notice it would start fading out and going to the floor when sitting at a light for a while...then one day it just went and i had no brakes...yeah that no fun. glad they took care of you. if not, they woudl prbally have had to recall all the trucks for brakes now that they got the gas fixed haha
 

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Discussion Starter #12
Yes, the brakes are power assisted by vacuum and will you feel a modulation in the pedal by load on engine but they should never go all the way to the floor. These people were trying to tell me that this was normal and they all do that. Thats a load of crap. I didn't just fall off a hay wagon. Anyway after some harsh language exchanges they decided to R&R and then were surprised that there really was a problem. So much for these factory trained mechanics. This is why I hate someone else working on my ride but I didn't want to eat the $180 for a new one and do it myself since it is still under warranty. Like pulling teeth to get a small job done.
 
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