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brake pedal height help #1488293
08/21/13 11:03 AM
08/21/13 11:03 AM
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yellow70charger Offline OP
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Help , I have a 70 charger 4 speed with power disc brakes the pedal seems low to me (see pic) as it will not engage the brake light switch it seems this rod is too short (see other pic) Is this rod to short? or is the clutch pedal to high?

7822221-CLUTCH.jpg (289 downloads)
Last edited by yellow70charger; 08/21/13 11:15 AM.
Re: brake pedal height [Re: yellow70charger] #1488294
08/21/13 11:07 AM
08/21/13 11:07 AM
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yellow70charger Offline OP
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pic of rod

7822227-ROD.jpg (230 downloads)
Last edited by yellow70charger; 08/21/13 11:09 AM.
Re: brake pedal height [Re: yellow70charger] #1488295
08/21/13 11:12 AM
08/21/13 11:12 AM
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yellow70charger Offline OP
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angle pic of pedal

7822233-clutch2.jpg (221 downloads)
Last edited by yellow70charger; 08/21/13 11:13 AM.
Re: brake pedal height help [Re: yellow70charger] #1488296
08/21/13 11:22 AM
08/21/13 11:22 AM
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Lincoln Nebraska
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RapidRobert Offline
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Quote:

Is this rod to short?


Yes that one is way too short.


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Re: brake pedal height help [Re: RapidRobert] #1488297
08/21/13 11:36 AM
08/21/13 11:36 AM
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yellow70charger Offline OP
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do you know where i could get a correct one?

Re: brake pedal height help [Re: yellow70charger] #1488298
08/21/13 12:38 PM
08/21/13 12:38 PM
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Oklahoma
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VoodooCLD Offline
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I was under the impression this was because of the power brakes which puts the pedal at a much lower position than the clutch.

I have the same issue, and was just gonna leave it. If there is a good fix, then i'm interested as well.

Re: brake pedal height help [Re: VoodooCLD] #1488299
08/21/13 12:44 PM
08/21/13 12:44 PM
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Grand Prairie,Texas
stumpy Offline
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I always thought that was normal pedal height for power brakes and the brake light switch is adjustable. Do you have the rear brakes adjusted to where they bearly contact the drums? That will bring the pedal up some.

Re: brake pedal height help [Re: yellow70charger] #1488300
08/21/13 02:34 PM
08/21/13 02:34 PM
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Rio Linda, CA
John_Kunkel Offline
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Pedal height mismatch is common with power brake/stick shift combos, it's because the brake pedal ratio is lower with power brakes.


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Re: brake pedal height help [Re: John_Kunkel] #1488301
08/21/13 05:27 PM
08/21/13 05:27 PM
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yellow70charger Offline OP
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adjustabe switch should do it then( to solve brake lights), and be happy with it or may two heim joints and adjust/trim thread to make it a adjustable height.

Re: brake pedal height help [Re: yellow70charger] #1488302
08/21/13 05:36 PM
08/21/13 05:36 PM
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Morristown Tn.
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71birdJ68 Online content
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As long as it doesn't bottom out on the floor, its ok. If you read the service manual it tells you that power brake pedals are further down than manual pedals.Thats so you can keep your heel on the floor and not throw every body threw the windshield.

Re: brake pedal height help [Re: 71birdJ68] #1488303
08/21/13 05:39 PM
08/21/13 05:39 PM
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yellow70charger Offline OP
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that makes sense thank you for the responses i guess i'll leave it and get the switch

Re: brake pedal height help [Re: yellow70charger] #1488304
08/21/13 05:41 PM
08/21/13 05:41 PM
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Morristown Tn.
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Also there is measurement for the switch. Look in the book.

Re: brake pedal height help [Re: 71birdJ68] #1488305
08/21/13 06:10 PM
08/21/13 06:10 PM
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ademon Offline
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Also the low brake pedal helps with a 4 speed on a hill when you have to tap dance the three pedals on take off!

Re: brake pedal height help [Re: yellow70charger] #1488306
08/21/13 09:02 PM
08/21/13 09:02 PM
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Lefty Offline
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Quote:

do you know where i could get a correct one?




Dr Diff has them. http://www.doctordiff.com/62-70-adjustable-master-cylinder-push-rod.html

Re: brake pedal height help [Re: Lefty] #1488307
08/21/13 09:18 PM
08/21/13 09:18 PM
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Quote:

Quote:

do you know where i could get a correct one?




Dr Diff has them. http://www.doctordiff.com/62-70-adjustable-master-cylinder-push-rod.html




That's for a manual brake setup I believe.


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Re: brake pedal height help [Re: Supercuda] #1488308
08/21/13 09:20 PM
08/21/13 09:20 PM
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Grand Prairie,Texas
stumpy Offline
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You could just try adjusting the switch that's already there.

Re: brake pedal height help [Re: 71birdJ68] #1488309
08/22/13 12:25 PM
08/22/13 12:25 PM
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Quote:

As long as it doesn't bottom out on the floor, its ok. If you read the service manual it tells you that power brake pedals are further down than manual pedals.Thats so you can keep your heel on the floor and not throw every body threw the windshield.




Hahaha! This made my morning.

Re: brake pedal height help [Re: VoodooCLD] #1488310
08/22/13 04:08 PM
08/22/13 04:08 PM
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Morristown Tn.
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If you notice, power brake pedals are about even with the gas pedal. They did that for a reason. Manual brakes, you have to use your whole leg, so you need the extra leverage to get the job done. Power brakes, the booster is doing the work.
What amazes me is back in the day, everybody knew this.Now, its forgotten.

Last edited by 71 RR- J68; 08/22/13 04:11 PM.
Re: brake pedal height help [Re: 71birdJ68] #1488311
08/22/13 06:17 PM
08/22/13 06:17 PM
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Rio Linda, CA
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I don't think the power pedal height is by design, as I stated earlier, it's just a consequence of the different pedal ratio for power/manual (as the pedal ratio decreases the pedal drops).


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Re: brake pedal height help [Re: John_Kunkel] #1488312
08/22/13 06:20 PM
08/22/13 06:20 PM
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Read the service manual.

Re: brake pedal height help [Re: 71birdJ68] #1488313
08/22/13 06:25 PM
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I don't recall any of my 4 spd cars having that much offset between the brake and clutch,
I looks a bit excessive to me

Re: brake pedal height help [Re: TJP] #1488314
08/22/13 07:42 PM
08/22/13 07:42 PM
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It didn't matter if it was a 4 speed or auto. If it had power brakes the peddle was close to the floor compared to manual. And it matter what brand it was either.Mopar, GM, Ford.

Re: brake pedal height help [Re: 71birdJ68] #1488315
08/22/13 11:39 PM
08/22/13 11:39 PM
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Quote:

It didn't matter if it was a 4 speed or auto. If it had power brakes the peddle was close to the floor compared to manual. And it matter what brand it was either.Mopar, GM, Ford.




Politely Disagree, A little offset, MAYBE!!! That much as shown in the pic is too much IMO. BTW I do restorations for a living (GM, Ford, Mopars etc )and one of my pet peeve's is just this subject. Along with several others.
IMO Either the clutch pedal is too high or the brake pedal is too low. The car would not leave my shop that way,

Re: brake pedal height help [Re: TJP] #1488316
08/23/13 01:20 AM
08/23/13 01:20 AM
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Ok, now this is out of a 71 service manual, but it should have been the same for most all years, it talks about power assisted application of the cars brakes,I quote " This provides lighter pedal effort in combination with reduced pedal travel, bringing the brake pedal height down to the approximate height of the accelerator when at closed throttle conditions." Now you could be right about clutch pedal. Who knows what parts are in that car now.Wrong clutch rod? That brake rod could be wrong,he needs to check everything against part numbers, but the point is, power brake pedals are supposed to be close to the same as the gas pedal. I don't remember if that rod is adjustable or not, if it is it would give a little movement on the pedal.If his brake light switch will adjust out, then he is ok.

Re: brake pedal height help [Re: yellow70charger] #1488317
08/23/13 01:31 PM
08/23/13 01:31 PM
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Rio Linda, CA
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Here's a pic of my old RR and the pedal height that seems typical of those I've seen.

7824776-Interior02.jpg (215 downloads)
Re: brake pedal height help [Re: John_Kunkel] #1488318
08/23/13 02:21 PM
08/23/13 02:21 PM
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Rancho Cordova, California (Sa...
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If it helps you any, a picture of the pedals, in the 71 Hemi GTX 4 speed car that i used to own.


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Re: brake pedal height help [Re: 71birdJ68] #1488319
08/23/13 03:24 PM
08/23/13 03:24 PM
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Could be the angle of the picture as well IE: #3

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