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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: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy kenneycj, it looks like a 55B - 59 Chev 1/2 ton rear axle to me, hope that helps. | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | '55-'62. There should be a number stamped on the passenger side of the 3rd memeber. That will be the code for year/ratio. Here's a picture showing where the number should be. If you can get the code, I can decipher it for you.
Bill Burmeister
| | | | | Joined: Sep 2008 Posts: 105 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2008 Posts: 105 | Bill,
Thanks for the picture. That helps alot. I will try to take a look tomorrow and see if I can find the code.
Chris | | | | | Joined: Sep 2008 Posts: 105 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2008 Posts: 105 | Ok I found the code--looks like NK 10 20. Any help in decoding it or a link to somewhere I can decode it.
Thanks!
Chris
Last edited by kenneycj; 10/10/2010 7:40 PM.
| | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | I'm coming up with a '55 1rst series with a 3.90 gear. The K part of the code doesn't seem to be listed, but all of the N codes come up as '55 1rst.
Bill Burmeister
| | | | | Joined: Sep 2008 Posts: 105 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2008 Posts: 105 | | | |
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