Virginiafiretruck, he may not have the same setup in his 59 as we do in our AD trucks.
Originally Posted by Viking59
I've clearly seen the vacuum switch bolted to the side of the tranny..
Where is your two speed axle switch mounted? Do you have any pictures of it? The adapter is likely not far away from this vacuum valve.
A truck with a factory installed two speed would have come with an adapter, did your truck come new with a two speed?

Grigg

Last edited by Grigg; 12/06/2008 2:28 AM.
•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-