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Click on image for the lowdown. 
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| | | Forums66 Topics128,048 Posts1,055,540 Members48,425 | | Most Online14,466
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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Mar 2004 Posts: 6,214 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,214 | I believe the Corporate GM vacuum shift rears were used until about 1972. I didn't have any problem getting a new diaphram for my '56 vacuum actuator few years back...parts man said it fit lots of years.
The push/pull cable will have a 4-port switch on the bottom end. One port is the supply, one for Hi range, one for Low range and one small port for the speedometer 2-speed adapter (mounted to the back of the speedometer).
Like Bill said, try your local big truck junk yard.
Mike B | | |
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