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No brakes in reverse???

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Old Mar 29, 2002 | 11:03 AM
  #1  
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Default No brakes in reverse???

I've replaced the calipers all around, new rubber lines, bled the brakes and still I have no brakes (or very little) in reverse. I am fine going forward.

Any ideas?

There is no fluid leak, the calipers are all new with new pads.
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Old Mar 29, 2002 | 07:16 PM
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Default Re: No brakes in reverse??? (phoenix)

Can't really offer much except to bring this TTT.

Are you using stock rotors?
Were they turned?

Does " no brakes (or very little) in reverse " mean the pedal goes to the floor, or the pads just don't hold?
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Old Mar 29, 2002 | 07:55 PM
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Default Re: No brakes in reverse??? (phoenix)

Only in reverse huh?? Is it a manual or auto?
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Old Mar 30, 2002 | 12:35 AM
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Default Re: No brakes in reverse??? (phoenix)

Tap your proportionator valve with a hammer and re bleed the brakes
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Old Mar 30, 2002 | 08:38 AM
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Default Re: No brakes in reverse??? (phoenix)

I am stumped on that one since I can't figure out the correlation between what gear you are in and whether or not you have brakes. Vacuum problem? We need more details: year? transmission? power brakes?

Gary
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Old Mar 30, 2002 | 10:23 AM
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Default Re: No brakes in reverse??? (GaryS)

Thanks for the replies.

The rotors are not new, nor were they turned. They didn't need it thankfully.

I think that my problem is my master cylinder. I wasn't getting a good jet out of the rear calipers like I was in the front.

So for $16 I bought a rebuilt one from Autozone, bench bled it, installed it and will bleed the brakes today. The core was $18 :lol: I love it when stuff you are troubleshooting is so cheap. :D


BTW- Power brakes, pedal always traveled to the floor in park but firmed up with higher revs, the real problem was no stopping in reverse... not enough movement of the rear pistons.


[Modified by phoenix, 9:27 AM 3/30/2002]
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Old Mar 30, 2002 | 11:12 AM
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Default Re: No brakes in reverse??? (phoenix)

I had a 71 that seemed to be much harder to stop in reverse. I never did figure it out but it is not your imagination.. Sometimes I really had to push hard on the pedal. Only in reverse???? Very strange :eek:
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Old Mar 30, 2002 | 12:47 PM
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Default Re: No brakes in reverse??? (phoenix)



BTW- Power brakes, pedal always traveled to the floor in park but firmed up with higher revs, the real problem was no stopping in reverse... not enough movement of the rear pistons.


[Modified by phoenix, 9:27 AM 3/30/2002]
Normally you place your foot on the brake and shift from park to reverse and give little or no throttle when backing up. Pedal feel is the same as when it went to the floor in park. Low vacuum at idle due to cam or vacuum problems. When traveling forward your foot is on the gas then off to the brake. High vacuum, and the brakes work.
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Old Mar 30, 2002 | 06:55 PM
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Default Re: No brakes in reverse??? (phoenix)

If the pedal is going to the floor, then the problem is air in the system, or master cylinder inner seals are leaking. Replacing the MC is the first step, next is proper bleeding...be sure to do the rear inside and outside twice to get all the air out...preferably doing the whole system twice with a test drive in between. If you don't get much coming out the rear then run clean fluid through with as much force as possible...maybe increase the idle to around 1200 to get the vacuum assist in your favor.
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