68 Barracuda Formula S proportioning valve

[My68FormulaS]

How do the proportioning valves work on Gen 2 A-Bodies work? My 68 has a proportioning valve on the inner fender well, but after researching this a little, it looks aftermarket. Does anyone have pictures of a Gen 2 Barracuda with the location of the proportioning valve? How are they adjusted?

Thanks
Glenn

 

[1967formulaS]

Hi Mate,

Here is a link to the correct one for disc brake front and drum rear.

http://www.classicindustries.com/product/1968/mopar/parts/md2267.html

It sits on drivers side front chassis rail between the firewall and steering box. Sorry i don't have a picture handy of the mounting, but one of the other guys on here will.
cheers.

 

[68original]

I can take a pic of mine when I get home and post. Guaranteed to be in the factory location.

 

[67cudafb]

This is what the factory valve looks like http://www.classicindustries.com/product/mopar/parts/md2274.html Factory is non adjustable.

 

[My68FormulaS]

Mine is factory power drum. Is that change the valve?

 

[68original]

Best I could get in a dark garage. Pics are from my 68 Formula S and unrestored original.
Valve is mounted in same location on both cars.
Hope they help.

 

[68original]

This one shows the proportioning valve from the bottom of my Formula S. The proportioning valve is approx. half way between the torsion bar mount and the brake system indicator switch (distribution block). Should be a mounting hole in the frame for a self threading bolt to mount the valve.

 

[68original]

To be clear, the picture you show in the start of the thread is the distribution valve, not the proportioning valve. Drum brakes in 68 did not have a proportioning valve, only a distribution valve. The proportioning valve was used on disc brake cars only.

According to the 68 parts catalog, both drum and disc brake cars used the same distribution valve.

 

[1969383S]

Here is the correct set-up. The main unit is just the safety switch and the rear hold off (prop) valve can be seen towards the rear after the short line. 383 cars had the stainless heat shield as well.

 

[My68FormulaS]

Thank you, that is exactly what I was looking for.

 

[My68FormulaS]

To be clear, the picture you show in the start of the thread is the distribution valve, not the proportioning valve. Drum brakes in 68 did not have a proportioning valve, only a distribution valve. The proportioning valve was used on disc brake cars only.

According to the 68 parts catalog, both drum and disc brake cars used the same distribution valve.

So, is that distribution valve correct? I don't have the build sheet for my car, but most everything else appears to be stock. I have looked at other 340 engine compartments, and I didn't see that valve. Any ideas?

Thanks Glenn

 

[craigerlitz]

Here is the correct set-up. The main unit is just the safety switch and the rear hold off (prop) valve can be seen towards the rear after the short line. 383 cars had the stainless heat shield as well.

Where did you get the heat shield? I never knew anything about them.

Thanks,
Craig

 

[1969383S]

Where did you get the heat shield? I never knew anything about them.

Thanks,
Craig

Accurate exhaust has them and believe they make them. Tom Swope can answer that.

Year one sells them as well.

 

[craigerlitz]

Gerald, I looked at my car and it does have the shield on it. I guess that I never paid attention to it.

Thanks,
Craig