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Click on image for the lowdown. 
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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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | If it is a 1950 truck 4-speed (called the SM420), all gears are synchronized for upshifting and downshifting (synchro-mesh).
Most likely you will not be downshifting into 1st gear until you stop (unless you have a very heavy load) - it is a very low gear. | | |
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