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Old 07-23-2004, 11:43 PM
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gm manual tranny id?

I picked up a free 3 speed gm manual tranny and i cant figure out what it is. it looks to be a 10 spline input i havent counted yet to be sure, and the output shaft looks to be the same as a th350. on the side it reads GM3952645
1263
25 K203
it has a 5 bolt mounting pattern from transmission to bell-housing. if that helps at all. the bell looks to be nicely reinforced also. any ideas on what it would be? thanks

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Old 07-24-2004, 01:25 AM
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vehicle identification numbers

maybe this site might help
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Old 07-25-2004, 01:10 AM
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i found some more things that might help, the shifter bolts on to the tranny with the driver side extension housing bolts. the shifter also bolts to the cross member not the extension housing end its self like my t 10 does. the shifter is shaped like a scythe. basically, looks like a hook almost as if the engine and trans sat far forward so it had to clear the dash. it has a short throw so i dont see much of a use for the shape but any ways.. it has a rod coming off the shifter that just points off like it bolted to the floor too. ive never seen any thing like it. but from what i can tell since it uses bolts to hold the shift rods to the forks it is a 69 or newer?
I think the closest thing i found was a 69 firebird that had a number of GM3952647 rather than my GM3952645
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Old 07-25-2004, 02:56 AM
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How many bolts on the side cover?

5-bolt mounting was usually used in trucks, I believe.

The rod sticking forward may be a stabilizer rod. My Saginaw 4-speed ('72 Nova) has one that bolts to a bracket at the rear of the main trans case.
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