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Mod | | | Forums66 Topics128,127 Posts1,056,678 Members48,452 | | 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 2006 Posts: 84 'Bolter | | 'Bolter Joined: Nov 2006 Posts: 84 | I am looking a picking up a new rear axle for my 1948 GMC. I found one out of a 1997 2500 4x4 HD but I would like to know the gear ratio befor I buy it. I have the production date motor size and vin. Is there anywhere I can look this up?
Thanks.. | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | If you have the VIN of the doner, you can check with any GM dealer to find out the equipment that was on it. Any particular reason you want to use that diff? I would think that it would be awfull wide for a '48, especially if you use the 4x4 version.
Bill Burmeister
| | | | | Joined: Nov 2006 Posts: 84 'Bolter | | 'Bolter Joined: Nov 2006 Posts: 84 | One of the reasons that diff appealed to me is the axle ends look almost identicle to what is on it. I measured the dust backing plates and they are the exact same distance appart (52") I did not get the wheels off of it today to see if the distance between wheel mounting surfaces are the same. I will check that tommorow.
Thanks for the info Bill. | | | | | Joined: Feb 2007 Posts: 513 Shop Shark | | Shop Shark Joined: Feb 2007 Posts: 513 | the rear end should be close to the same width
1949 Chevy 3600 Flatbed all orginal 1964 gmc 4000 1973 gmc 6000 2005 chevy duramax 4x4 1994 chevy 1500 Trucks are GM and Tractors are Orange "I don't measure a man's success by how high he climbs but how high he bounces when he hits bottom." - General George S. Patton | | | | | Joined: May 2005 Posts: 8 Junior Member | | Junior Member Joined: May 2005 Posts: 8 |
1957 3600 line built Napco
1957 6400 350 and hoist
1949 3600 14 year project
Lots of other jeeps,chevs, Yota and even a F**D
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