Hi.. we've pulled the vacuum control valve from the back of our speedometer on a 1948 FC303 1 1/2 ton truck. This is for the low-high axle. (page 55-58 on the repro gmc maintenance manual)
The diaphram is rotted out, and we're wondering if anybody out there still makes this valve, or if anybody knows what diaphram parts might fit in the original?
Any help would be great!
Last edited by turpentyne; 09/14/2008 8:28 PM.
