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Click on image for the lowdown. 
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| | | Forums66 Topics128,156 Posts1,057,021 Members48,460 | | 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!
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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: Jun 2012 Posts: 1,749 'Bolter | | 'Bolter Joined: Jun 2012 Posts: 1,749 | I don't have a 47 to poke at. But the kind folks at Novak seem to think the 47-53 are the same(includes synchros?). The torque tube changes to open after 53? Here is a link to the "Information" part of the site: https://www.novak-adapt.com/knowledge/transmissions/manual/sm420 With out one to poke and mess with this is as good as I can do.
Steve H
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