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Old 05-02-2006, 09:15 PM
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74 nova rear

would any one know the ratio in my factory 74 nova rear end its a 6cyl car 350th trans just wondering cause im transplanting a 350 in it this week end.i heard since its a 6 banger it could be pretty low geared i hope so

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Old 05-02-2006, 09:36 PM
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anywhere from 2.56 to 4.11. It probably has a 2.73 or a 3.08. those were very common for 6 cyl cars. If yo can get the axle code on the passanger side facing forward i can give you what was in there from the factory. the only real way to see whats in there now is to pull the cover.
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Old 05-03-2006, 10:15 PM
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http://novaresource.org/axle.htm says 3.08 came standard with the 6. Codes can be found there, also. Like 1969NovaSS said, somebody could have changed something since 1974.

If you pull off the rear cover, look around the edge of the ring gear until you find a series of numbers, usually 4 numbers total. Might be a 7-digit part number, also. Two of the numbers will be the tooth counts of the ring & pinion gears, and the other two will be the date of manufacture. For example, say you see 40 13 12 73. The "40 13" will be the tooth counts, the larger of which you divide by the smaller to get your gear ratio (40/13=3.0769 or 3.08). The "12 73" means the gear set was manufactured in December, 1973. Etc., etc., etc.
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