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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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#73920 02/27/2007 1:33 AM | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | Definetly not normal. They should both be 4.56, or at least within .01 of each other. According to my 4x4 guide, neither ratio was available for a GMC that year in a 3/4 ton. It sounds like the axle have been changed. Question-Is the front open or closed knuckle? If it's open, then it's a '69 or later axle. You definetly need to get both diffs with the same ratio. T-case damage can result with the difference that you currently have.
Bill Burmeister
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