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| | | Forums66 Topics128,060 Posts1,055,838 Members48,427 | | 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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| | | | Joined: Nov 2000 Posts: 1,966 'Bolter | | 'Bolter Joined: Nov 2000 Posts: 1,966 | Novak Adapters has a great website with a really informative article about the SM420 trans. Try http://www.novak-adapt.com/knowledge/sm420.htm for serial no. codes, etc. I had a 50 3/4 ton with 2 piece drive shaft. The trans. tail shaft had the 4-bolt flange for that ball shaped u-joint housing (just like a 1/2-ton) and the front drive shaft was torque-tube back to the carrier bearing. The rear shaft was open.
Professional Novice
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