73 4 speed brake pedal height

[Douglas C.]

My 73 brake pedal about 3 1/4" off floor, too close to accelerator. See pics20221025_134902.jpg, hard to see but looks like clevis at end of rod threads. Brakes work fine, fresh fluid. Does this sound correct or can rod and/or clevis be too short. Restored car and all functions correctly.

[Douglas C.]

Re: 73 4 speed brake pedal height

Sorry, This is power brake car.

[John S.]

Re: 73 4 speed brake pedal height

Douglas, just checked my ‘73 4 speed w/PB, from the face of the brake pedal to the carpet (floor mat removed) I measured 4”, a little higher than yours. I’ve replaced the booster and rebuilt the master but never made any pedal adjustments. The same measurement on the clutch pedal is a bit higher @ 5 3/4”. Hope this helps.

[Douglas C.]

Re: 73 4 speed brake pedal height

Douglas, just checked my ‘73 4 speed w/PB, from the face of the brake pedal to the carpet (floor mat removed) I measured 4”, a little higher than yours. I’ve replaced the booster and rebuilt the master but never made any pedal adjustments. The same measurement on the clutch pedal is a bit higher @ 5 3/4”. Hope this helps.

Thank you John. I'm wondering, have to get a better pic, but maybe my clevis is not correct length. I would think a longer clevis would raise the pedal. My AIM from what I see indicates around 5" off the floor board.

[Bill B.]

Re: 73 4 speed brake pedal height

Doug,

My 1970 w/ P/B pedal measures approx 4" from floor, and my clutch pedal is approx 5" from floor. While I am no expert here, I believe that the retracted pedal stop is controlled by the metal housing frame assy to which the pedals are connected. The clutch pedal has a rubber bumper between the pedal and frame, but the brake pedal does not. The brake pedal does, however, have a brake light switch with an adjustable position. Make sure that pedal switch is not misadjusted and causing the pedal to restrict its retraction travel. From the picture above, it appears not to be, but that is assuming the picture was taken in the pedal's relaxed state.

What do you feel if you pulled the pedal away from the floor? Any travel? Hard stop?

[Douglas C.]

Re: 73 4 speed brake pedal height

Doug,

My 1970 w/ P/B pedal measures approx 4" from floor, and my clutch pedal is approx 5" from floor. While I am no expert here, I believe that the retracted pedal stop is controlled by the metal housing frame assy to which the pedals are connected. The clutch pedal has a rubber bumper between the pedal and frame, but the brake pedal does not. The brake pedal does, however, have a brake light switch with an adjustable position. Make sure that pedal switch is not misadjusted and causing the pedal to restrict its retraction travel. From the picture above, it appears not to be, but that is assuming the picture was taken in the pedal's relaxed state.

What do you feel if you pulled the pedal away from the floor? Any travel? Hard stop?

Thanks Bill, I'll take a look at that. The real issue driving is my foot on the accelerator has my foot scraping side of brake pedal. Accelerator and brake pedal pad only 2" apart. See pic as brake pedal looks like it's tweaked slightly right. And wondering if I loosened accelerator pedal bracket could I move it slightly right. Overall just seems odd.20221025_115356.jpg

[Douglas C.]

Re: 73 4 speed brake pedal height

Hi again Bill. As to last question you asked pulling up on pedal has no movement. Pushing on pedal is solid feel and about 1/4" or less free play. About what AIM shows if I am reading that page correctly.

[Bill B.]

Re: 73 4 speed brake pedal height

What my spacing looks like when the camera lens is centered on the brake pedal:
Pedal Spacing.jpg

[Bill B.]

Re: 73 4 speed brake pedal height

I measure my pedal spacing (center to center) as 5 7/16" between clutch and brake, and 4 1/2" between brake & accelerator pedals on my '70.

[Douglas C.]

Re: 73 4 speed brake pedal height

I measure my pedal spacing (center to center) as 5 7/16" between clutch and brake, and 4 1/2" between brake & accelerator pedals on my '70.

Just measured mine center to center, same as you posted. See pic more centered look. The only difference to yours seems to be your brake pedal 4" off floor and mine 3 1/4". I put a straight edge on brake pedal and about 3/4" higher than accelerator pedal. So, I'll check underneath as you suggested. I think C3 pedal arrangement is just a little tight at best. Tks.20221027_102348.jpg

[Bill B.]

Re: 73 4 speed brake pedal height

Doug,

My 1970 AIM indicates a P/N 3781770 "Bumper", that is used at both the clutch pedal and brake pedal locations to rest against when fully released. However, when examining mine (had to severely contort myself to get under there), the clutch pedal bumper appears to be rather thick in height, whereas the brake pedal bumper appears to be not as thick. While I can't get up there to measure, just visually, it appears the brake bumper is about 1/3 the thickness of the clutch bumper.

Perhaps others who have more expertise in this area can respond and shed some light on this. Is it possible St. Louis production assy line trimmed down the brake pedal bumper as an op? I kinda doubt it, but ...

Interesting!

[Douglas C.]

Re: 73 4 speed brake pedal height

Doug,

My 1970 AIM indicates a P/N 3781770 "Bumper", that is used at both the clutch pedal and brake pedal locations to rest against when fully released. However, when examining mine (had to severely contort myself to get under there), the clutch pedal bumper appears to be rather thick in height, whereas the brake pedal bumper appears to be not as thick. While I can't get up there to measure, just visually, it appears the brake bumper is about 1/3 the thickness of the clutch bumper.

Perhaps others who have more expertise in this area can respond and shed some light on this. Is it possible St. Louis production assy line trimmed down the brake pedal bumper as an op? I kinda doubt it, but ...

Interesting!

Thanks again Bill. I think my car, power brakes, did not call for a brake pedal bumper. Took more pics. Clevis looks correct. Before I maybe mess something up could the brake light switch adjustment effect relaxed pedal height. All measurements look in line with others, except brake pedal just seems a little low. Free play slightly less than 1/4" so that looks correct per AIM. Thanks all for your comments.20221027_181438.jpg20221025_164556.jpg