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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: May 2004 Posts: 67 'Bolter | | 'Bolter Joined: May 2004 Posts: 67 | Does any one know the part number or numbers for a 1964 C50 Chevy truck with a 2 speed axle? What's the best way to test to see if the vacuun shift is working or not? I have gotten under the truck while in netural and let my son engage the two speed but I don't hear any noise while pulling the knob in or out. | | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy mule 1951, what part numbers are you looking for, does the engine change its sound while your working the control? | | | | | Joined: Feb 2007 Posts: 190 Shop Shark | | Shop Shark Joined: Feb 2007 Posts: 190 | I would make sure your lines are connected, if so I would take em off and make sure their clear, not clogged up. You should be able to tell real quick. Mine makes a clear click noice, you can hear it move. It might effect the engine rpm, but I dont think I have ever noticed that. You could also pop the cover off and see if the diaphragm looks ok. Maybe Napa might have a kit, just a guess, good luck. | | |
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