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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: Sep 2001 Posts: 29,270 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,270 | The drive grear is mounted "on" the transmission output shaft (actually, I dimly recall that it is mounted on the u-joint yoke on an SM420 The driven gear is screwed into the transmission body, and the speedometer cable attaches to it. I think that some drive gears and driven gears can be mixed-and-matched, but they came as matched pairs. I have purchased speedometer adapters from the The Speedometer Shop to get almost perfect mph readouts on two trucks. Also, Bruce Bugay sold me a NOS one set of NOS speedometer gears. | | |
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