Soft brake pedal
#1
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Car: 1984 Z28
Engine: 4bbl 305ci
Transmission: 700R4
Axle/Gears: 10 bolt 3.42 w/ Auburn LSD
Soft brake pedal
what are some things that could cause a soft brake pedal, other than pads needing to be replaced? I dont think there is any air in the lines because i have changed pads several times since i have had the car and it has always been the same even after changing front and back brakes. What do you guys think?
#2
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Car: 92 Camaro Z28 Convertible
Engine: 5.0 Tpi
Re: Soft brake pedal
Hyper, I dont think that worn down pads would cause a spongy pedal.. They would just grind lol. Try bleeding the brakes and make sure you have enough fluid in the master. Check your wheel cylnders too as they can cause that to happen. Good luck mate
#3
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Car: 1983 Pontiac Firebird
Engine: LG4 305ci 4bbl
Transmission: 700r4
Axle/Gears: 10-bolt open diff.
Re: Soft brake pedal
actually, i noticed a difference when i changed my pads. not huge, but the pedal felt a little less spongy. also, look into replacing the rubber brake lines in the front and back- the old rubber tends to expand when the brakes are applied, giving a spongy pedal. or you can go to a steel braided line and never have that problem again.
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Car: 1984 Z28
Engine: 4bbl 305ci
Transmission: 700R4
Axle/Gears: 10 bolt 3.42 w/ Auburn LSD
Re: Soft brake pedal
yea faded brake pads will make the pedal a little spongy but that is to be expected. I stay on top of all the fluids so i know its good (pet peeve). I kinda figured that the brake lines could be causing some of it too. Will upgrade those when i do my rear disc conversion. Do you guys have any experience with these? What are your thoughts? I was thinking the other day that i may not have my rear shoes adjusted correctly. What is a good way i can check if they are adjusted properly? Still the stock drums.
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Car: 87 GTA
Engine: 385 sbc
Transmission: 700r4
Axle/Gears: 2.73 posi
Re: Soft brake pedal
pull the back tire off . push the drum tight to the axel and twist it back and forth just a little if you dont feel any resistance turn the adjuster till you do, then turn it back 1 click at a time until no resistance is felt. take the car out and make a few stops in reverse.
#6
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Car: 1984 Z28
Engine: 4bbl 305ci
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Axle/Gears: 10 bolt 3.42 w/ Auburn LSD
Re: Soft brake pedal
okay i will do that. Thanks will let you know how it works out.
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Car: 1992 RS / 1989 RS
Engine: 3.1L MFI / Vortec 383 TBI
Transmission: T5 / LS-T56
Axle/Gears: 3.42 open / 3.73 Eaton posi
Re: Soft brake pedal
pull the back tire off . push the drum tight to the axel and twist it back and forth just a little if you dont feel any resistance turn the adjuster till you do, then turn it back 1 click at a time until no resistance is felt. take the car out and make a few stops in reverse.
Had to do that myself. I also had to take the adjusters apart and lubricate them really well so they would actually work, they were all cruddy and frozen up.
#9
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Car: 87 T-Top GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.27
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Car: 87 T-Top GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.27
Re: Soft brake pedal
If you press hard and long enough you can over heat your brakes. And if you do that enough times you can get like these heat pockets that will give you that soft feeling. Kinda like air bubbles.
I also plan to dump the dot 3 fluid and put dot 4 fluid in, (higher resistence to heat bubbles). My brakes should stay firmer for longer.
I also plan to dump the dot 3 fluid and put dot 4 fluid in, (higher resistence to heat bubbles). My brakes should stay firmer for longer.
Last edited by y84pauloflondon; 09-23-2009 at 07:52 PM.
#11
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Car: 1984 Z28
Engine: 4bbl 305ci
Transmission: 700R4
Axle/Gears: 10 bolt 3.42 w/ Auburn LSD
Re: Soft brake pedal
yea it's been a year later and still haven't even bothered with it. Don't drive her around much what w/ the gas prices up and down and 100 mile round trip drive every day. My plan is to drain the fluid and replace along with upgrading the lines, calipers, pads, etc. But that is at the bottom of the 400 page list of other to-do's.
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Car: 87 T-Top GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.27
Re: Soft brake pedal
Soooo, what did you end up doing about your soft brakes for the time being?
#13
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Car: 1984 Z28
Engine: 4bbl 305ci
Transmission: 700R4
Axle/Gears: 10 bolt 3.42 w/ Auburn LSD
Re: Soft brake pedal
as of yet... nothing. Just don't follow too closely and don't get in any big hurry when i do take it out for a drive. Since it's not a daily driver other priorities come first.
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