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Click on image for the lowdown. 
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| | | Forums66 Topics128,130 Posts1,056,702 Members48,454 | | 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
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | 1940 was the first year in trucks to use a Hypoid rear end. Patrick's gear set is a Hypoid design and will only work in 40-54 diffs.
FYI, Hypoid means the pinion makes contact below the center line of the ring gear.
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