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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: Mar 2004 Posts: 6,214 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,214 | Flat 67,
The speedometer speed reduction unit should be atached to the back of the speedometer. It has a small vacuum diaphram that shifts the speedometer from high to low range to match the rear. All 2-speed rears have the same 1.36 differential, so all of the reduction units are the same. I'm betting yours has dry rot and that's why it no longer works.
Mike B | | |
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