Color of proportion valve

[Brant]

BTW, here is a Blog post that I wrote about the restoration of the original proportioning valve from 6S033.

http://blog.virginiaclassicmustang.com/2012/10/65-66-mustang-and-shelby-disc-brake.html

[Dan Case]

What is the correct color on the outside of the proportion valve? I have seen both semigloss black and grey with the bare metal areas. Any help would be appreciated. Thanks  This is for 65 Shelby.

I depends on how early of a car. It is easy to say a mid or late production car would be black . Not so much with the earlier builds. In the beginning Shelby's used the ones that were gray just like a regular Mustang. SA had problems with the 2 1/2 inch rear brakes locking up. After a while SA got Ford to specify from the MFG to pre adjust the proportioning valves (backed off from typical Mustang adjustment) and most likely to make it easier to identify on the Ford assemblyline the valves were now painted black. The engineering number changed to a different C5ZX number also which the ZX designation typically meant a Shelby item. The only difference is the adjustment and the color.

SFM5S142 had a gray one. I kept it for years as a sample, eventually somebody with one with stripped threads talked me out of it for their car.

[whiteykr]

Thanks Bob and Brant for the info and blog. Brad

[1109RWHP]

Is the lock nut always gold? I read that they were supposed to be silver.

[Brant]

Is the lock nut always gold? I read that they were supposed to be silver.

I have another with what is possibly a silver nut (or worn plating).

[Bob Gaines]

There is no push back with silver in concours.