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Old 03-09-2013, 07:06 PM   #1
Daddy Brim
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Join Date: Feb 2011
Location: Clovis Ca.
Posts: 632
Overdrive+Gear Ratio=Gas Millage

I have a 67 C20 with 350 engine, turbo 400 trans. It also has a Gear Vendor overdrive, it is mounted were the carrier bearing would be. I had the cover off the rear end ( it is a Dana 60 ) and counted the teeth on the gears, 41/16 so it has 2.56 gears. I'm thinking this is probable a good set up for gas millage. The PO. used the truck to pull a 5th wheel trailer, so I guess it has good pulling power. Is this correct or wrong. This is one area I have no knowledge of.
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67 C-20 Custom Camper
68 Nova 396 it does wheelies
2005 Buick Century the one the wife drives
1989 Toyota Tercel to drive when I can't put gas in the first 2.
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