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Old 06-10-2020, 09:36 AM   #53
rotorwrench
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Join Date: Jun 2010
Location: San Antonio, Texas
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Default Re: 1951 Ford overdrive

The Ford Chassis Parts Catalog from 1928 thru 1948 is the one I've always found referred to as the green bible but there are likely a shop manual with a similar color. Any one of them for the early to mid 50s should have the info. In 1951, the gears changed over to the diamond cut pattern but the OD was the same basic unit. The Mercury changed somewhere around February of 1951 to the same basic unit as used by Ford except it had a different bell housing & clutch. The ones used in 1952 & 53 were essentially the same for both Ford and Mercury.
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