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Click on image for the lowdown. 
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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 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | Being such a large truck it's not likely a BW overdrive unit like used on the small trucks and cars.
Could be a Clark 5 speed overdrive, or possibly a Spicer. Or could be an auxiliary transmission with overdrive after the usual 4 or 5 speed, If so likely a Spicer 3 speed, possibly 4. | | |
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