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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!
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| | | | Joined: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | This got my curiosity up so I pulled the governor off my spare. It has 20 teeth. The gear is stamped IRIOH-73.
Now my thinking has changed. If it were one or two teeth difference it might be OK. From 15 to 20 teeth is quite a jump. Less teeth is going to spin the gov. faster, meaning you will engage OD at lower speeds. And of course hold it in OD at lower speeds as you slow down. I believe I'd look for a 20 tooth gear. | | |
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