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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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| | | | Joined: Dec 2011 Posts: 264 Shop Shark | | Shop Shark Joined: Dec 2011 Posts: 264 | trying to figure out which speedo drive gear and driven gear i need. t5 tranny with .76 od. 3.90 rear gears and 215-85-16 tires. any help would be great. | | | | | Joined: Mar 2010 Posts: 10,272 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,272 | Many S10s which had t-5 transmissions behind a 4 cylinder engine have an adapter which goes between the cable and the transmission. Worked on my truck. Go to the junk yard.
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Dec 2011 Posts: 264 Shop Shark | | Shop Shark Joined: Dec 2011 Posts: 264 | what did the adapter do, what was it for.
| | | | | Joined: Mar 2010 Posts: 10,272 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,272 | It changed the ratio from the transmission to match the speedometer. It is a geared reducer. Screws right on.
Carl
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
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