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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: Sep 2009 Posts: 5,813 Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT | | Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT Joined: Sep 2009 Posts: 5,813 | Chaz 58,
The "bolt" next to where the cable housing screws in should be retaining a metal tab that keeps the speedo drive "plug" in proper position in your tailshaft housing.
Without knowing exactly which "3 speed overdrive" you used as a replacement, it's hard to determine if you overfilled it or not.
Thinking you need to do a bit to determine what you have, check appropriate shop manuals for type/vintage and check back in with updated info and question.
A picture or two wouldn't hurt either.
~ Dan 1951 Chevy 3 window 3100Follow this story in the DITY Gallery"My Grandpa Carl's Truck and How it Became Mine"1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
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