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Mod | | | Forums66 Topics128,193 Posts1,057,260 Members48,466 | | 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: Sep 2006 Posts: 3,596 'Bolter | | 'Bolter Joined: Sep 2006 Posts: 3,596 | Parts come up on eBay NOS. As to failure it is 64 years old and probably on its original build. For second gear if I had to hazard a guess low oil or tar and a forced shift. Your best bet would be to source another SM-420 they are rarely more than $100-150 anywhere. | | |
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