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As to which is a better axle, GM Corp. or Rockwell, that depends on your preferences. Do you want top loading diffs like Rockwells or front face loading loading like the GM Corp. I believe I read some where that the GM axle shafts are a little thicker than Rockwells. However with the...

Google GM Corp 2.5 ton axles and you will find many sites and write ups about them. As stated 6.17 to 1 ratio. Differential chuck and ring and pinion were made by Eaton as far as I can tell from my research. They are a HO110 ring and pinion. 12.5 or so inches in diameter. There was three...