C3 Pedal assemblies
Thread Starter
Instructor
Joined: Dec 2009
Posts: 146
Likes: 4
From: Penville On.
C3 Pedal assemblies
I am rounding up parts to change my 71 from auto to four speed. Is there any difference in the pedal assemblies in the various years? Does it make any difference if the car has power brakes or standard?
Thanks Jackk
Thanks Jackk
Thread Starter
Instructor
Joined: Dec 2009
Posts: 146
Likes: 4
From: Penville On.
Le Mans Master
Joined: Mar 2001
Posts: 6,240
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From: Watkinsville, GA and Glen Cove, NY
The pedal box is the same. I have been told that the automatic brake pedal has the same contour as the 4 speed brake pedal. It is just the pedal itself welded to the rod is wider. So if that is true you should be able to use your brake pedal by just cutting the pedal or torching it off and welding a smaller "pad" on. Hopefully someone who has done this will chime in. If someone has a 4 speed brake pedal and could take a pic, I have an automatic brake pedal out of a 72 I could post a picture of to compare.
Bill
Bill
Last edited by 69ttop502; Dec 16, 2009 at 07:03 PM.
Terrorizing Orange Cones
Joined: Oct 2007
Posts: 2,572
Likes: 17
From: Northern CO
These are out of my '72 car: before and after cleanup.
I disassembled the assembly to clean, inspect, paint, replace the shaft bushings, add new brake return spring, install new pads, and new trim.
Hope that offers some contrast for 69ttop502's image of an auto setup.
I disassembled the assembly to clean, inspect, paint, replace the shaft bushings, add new brake return spring, install new pads, and new trim.
Hope that offers some contrast for 69ttop502's image of an auto setup.
Thread Starter
Instructor
Joined: Dec 2009
Posts: 146
Likes: 4
From: Penville On.
Thanks Bill, It's interesting that you should suggest that because my friend and I were talking about just that today. We were wondering if the auto pedal could be modified and the clutch pedal added.
Jack
Jack
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Instructor
Joined: Sep 2007
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A power brake pedal housing is different than a manual. Also, the switch actuator braket is different for PB and manual. A 68 will have a funky (and expensive) brake light switch. Not sure when the nutural saftey switch was added.
Here is a picture of the mounts holes for PB and manual
Here is a picture of the mounts holes for PB and manual
Drifting
Joined: Sep 2007
Posts: 1,572
Likes: 51
From: Wichita Kansas
That is a very nice looking job!!!
Heel & Toe
Joined: Apr 2009
Posts: 20
Likes: 0
From: Xenia Ohio
I recently converted my '79 auto to 4 speed.
I suggest you buy the kit with pedals & hardware. Not that expensive.
The kit I bought was for '69 thru '79, you can get kit from a couple different places.
It will fit your existing pedal housing, no problem. I had to make a new brake light switch bracket. Wish I would of converted mine years ago, going thru the gears is awesome!
I suggest you buy the kit with pedals & hardware. Not that expensive.
The kit I bought was for '69 thru '79, you can get kit from a couple different places.
It will fit your existing pedal housing, no problem. I had to make a new brake light switch bracket. Wish I would of converted mine years ago, going thru the gears is awesome!
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
Yes, both of you are correct, Power Brake box is on the left. The Power Brake box has 4 round holes while the manual brake box should have a set of studs in the top square holes and 2 bolts go into lower holes in box from engine compartment side of firewall. That is why the upper holes are square in manual pedal box, for the studs to "key" into sheetmetal and capture the bolts.
Look at a power brake booster and you will find 4 studs welded to it to mount it into your Vette. The FUN! part of the installation job is getting to and tightening the upper power booster mounting nuts while contorting beneath the dashboard in a assembled Corvette
Look at a power brake booster and you will find 4 studs welded to it to mount it into your Vette. The FUN! part of the installation job is getting to and tightening the upper power booster mounting nuts while contorting beneath the dashboard in a assembled Corvette
Safety Car
Joined: Nov 2008
Posts: 3,717
Likes: 551
From: Seattle Washington
The early cars with the Crome Pads are a bit larger than the Late cars with the rubber pads. I found this out at the very end of a auto to clutch conversion. However a little sawing of the metal off the levers will convert them and allow the late rubber covers to fit right on. Converting a late pedal to fit the early covers would be much more involved.
