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Mod | | | Forums66 Topics128,049 Posts1,055,680 Members48,426 | | 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: Jun 2006 Posts: 8 Junior Member | | Junior Member Joined: Jun 2006 Posts: 8 | How do I determine the differential gear ratio of my recently acquired 1940 Chevy 3/4 ton pickup? Also, were there multiple "rear ends" in the early years? If it makes a difference, the original 216 was replaced with a "56" 235ci quite some time ago.
Jerboe
Fallbrook, Ca.
| | | | | Joined: Mar 2006 Posts: 76 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2006 Posts: 76 | The way I was tought is to count the teeth on the ring and pinion gear and divide them, that will give you your ratio. Jeremy
1961 k-10
86 c-20
02 duramax
| | | | | Joined: Nov 2005 Posts: 266 Shop Shark | | Shop Shark Joined: Nov 2005 Posts: 266 | There was a post on this in the Engine and Driveline Shop just a few days ago that dealt with torque tube gear ratios.
Drew | | |
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