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Click on image for the lowdown. 
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| | | Forums66 Topics128,151 Posts1,056,994 Members48,460 | | 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
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| | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | I have not heard that the Chevy and GMC differentials for 1970 were different. I also didn't think that they came with positraction. The full floating front loaders from 67 to 72 have pumpkins that will bolt in to the 49 3/4 Ton. They made 4.10 gears for the 3/4 Tons with automatics.
By the way the standard ratio for a 49 3/4 Ton would be 4.57 and the 5.14 is for the 1 Ton. | | |
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