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Old 05-06-2011, 07:49 PM
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frederick_76 frederick_76 is offline
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Default 833 I.d.???

What numbers am i looking for to I.D. (find the year) my tranny? Here are some i found: C 96561 H, C86708K, C95664, and 3x14x6 6 or 5. Thanks.
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Old 05-07-2011, 06:05 PM
John Kunkel John Kunkel is offline
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The raised casting numbers are of limited use for ID purposes, the casting date 3x14x6 could be '66 or '76.

If there is a raised boss on the passenger side of the main case it is '68 or later and will have a build date stamped in it. If not, it's probably a '66 and can only be identified by input shaft spline count (18 or 23) and the tailhousing length. You'll find some useful info here:

http://www.slantsix.org/articles/4-s...fourspeed1.htm
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Old 05-08-2011, 07:17 AM
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Ray Bell Ray Bell is offline
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You can also physically check the first gear ratio, that will help a bit...

2.66:1 is the early V8 ratio, 3.09:1 is the early slant 6 ratio (essentially, there was some mixing and matching) while 2.47:1 is the later ratio for all.

An alloy case will be an overdrive unit, there is also the size of the bearing retainer to be considered.
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Old 05-13-2011, 07:03 PM
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frederick_76 frederick_76 is offline
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Well its a 23 spline short shaft, A body Trans. The 3x1466 is on the "drivers side" it is on a raised boss. There is a tag bolted on the case cover says 10 25 66, but dont know if thats a stock tag??
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Old 05-14-2011, 07:29 PM
John Kunkel John Kunkel is offline
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An October '66 casting date would be a '67 model year transmission.
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Old 05-15-2011, 02:17 PM
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Awesome, Thanks for the help!!
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