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Old 01-30-2010, 10:54 AM
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saginaw four speed identification

Hi, i have a four speed that i just acquired, the guy i got it from said it might have came out of a corvair, but didn't know for sure. i did a search on the casting numbers, i found on the main trany housing but came up empty. the only Saginaw numbers i have found are for the tranys that came out of camero's and nova's. i'm wondering if anyone knows were i can reference my casting numbers and find out for sure what this four speed actually came out of and find out what gear ratios im working with.

thank you,
Eddy

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Old 01-30-2010, 11:35 AM
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Transmission id,,,,,

Hi,send an Email to Clarks corvair .com,with the Numbers off of the trans,if its from a corvair,Clark should be able to id it.
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Old 01-30-2010, 02:44 PM
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Corvairs did come with Saginaw and Muncie 4 speeds. Not sure if they looked much like a conventional trans though as Corvairs used a transaxle.

Last edited by Centerline; 01-30-2010 at 02:50 PM.
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Old 01-30-2010, 03:42 PM
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Saginaw from a Corvair looks a lot different than a rear wheel drive Saginaw, it has no tailshaft, only the case and side cover look like a conventional Saginaw, input and output shafts are different.

No Corvair ever used a Muncie trans, the Saginaw was all that was used in them.
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Old 01-30-2010, 03:46 PM
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Quote:
Originally Posted by ericnova72
Saginaw from a Corvair looks a lot different than a rear wheel drive Saginaw, it has no tailshaft, only the case and side cover look like a conventional Saginaw, input and output shafts are different.

No Corvair ever used a Muncie trans, the Saginaw was all that was used in them.
odd, I've rebuilt 2 muncie based trans from Corvairs... they were is V8 applications with the engine behind the front seat.

don't let it get out that rebuilt manual trans

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Old 01-30-2010, 03:48 PM
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Quote:
Originally Posted by Crosley
odd, I've rebuilt 2 muncie based trans from Corvairs... they were is V8 applications with the engine behind the front seat.

don't let it get out that rebuilt manual trans

To late it's out.


Cole
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Old 01-30-2010, 04:03 PM
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Good one Crosley , you perfectly well know that someone adapted those Muncie 4-speed cases onto the Corvair transaxle just for use behind a V8. Or were you referring to 3-speed Muncie manuals??

Chevy factory never put any 4-speed manual on the Corvair transaxle except the Saginaw, even the top option the 180 Hp Turbo Spyders only had Saginaws.
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Old 01-30-2010, 06:41 PM
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Correct. Chevy never put the Muncie in the Corvair. Funny what time and age can do to your memory.
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Old 02-01-2010, 01:06 AM
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OK well getting back to my question, so now i don't think my tranny is out of a corvair because it looks like a normal transmission. does any one know of a web site that has a list of casting numbers?
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Old 02-01-2010, 06:16 AM
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Manual Transmission

Hey Rat, This is how I ID'ed one a while back. To determine ratios, you can put it into different gears, turn input shaft and count output shaft revs. olnolan
http://www.google.com/search?hl=en&q...&aq=f&aqi=&oq=
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Old 02-01-2010, 09:37 PM
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i'm still not having any luck identifying my Saginaw four speed im trying to find out what car it came out of.
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Old 02-01-2010, 09:52 PM
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Casting #'s aren't going to tell you exactly what it came out of, they will only give you a general idea of what range of years and possible models it could have come out of.
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Old 02-01-2010, 10:58 PM
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So far as I know there is no positive way to know exactly what a Saginaw came out of.

If you have a codebook, you could match up the painted letters on the bottom of the case and the stamped numbers on the bulge of the case next to the side cover. That would still not get you application, but would get you exactly what you have.
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Old 02-02-2010, 09:50 AM
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I don't believe you need to positively ID your Saginaw. As far as I can tell there were no significant differences in the RWD Saginaw 4 speeds over the years. As an example of this Drivetrain.com shows the same rebuild kit for 99% of all Saginaw RWD 4 speeds.

Knowing the specific gear ratios will help but still not ID the trans. However the higher 1st gear ratio will probably indicate a truck trans. Gear ratios are indicated by the number of grooves on the input shaft.

4 speed Saginaws

no Lines= 2.84- 2.01- 1.34- 1.00
1 Line= 2.54- 1.80- 1.44- 1.00 common
1 Line= 2.54- 1.80- 1.32- 1.00 rare
2 Lines= 3.11- 2.20- 1.47- 1.00
3 Lines= 3.50- 2.46- 1.65- 1.00
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Old 02-02-2010, 09:24 PM
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There are also truck Saginaw 4spds that have an extra trans/bellhousing bolt at the center/top. The one i have came with a 1" x 14 spline input shaft and has a 3.50 1st gear, but slightly different ratios in 2nd and 3rd than the common 3.50 ratio "3 groove" 4spd. Internal case dimensions are exactly the same, as i have cut the extra mounting hole from the top of the case and installed gears and input shaft from one of my 3 groove Saginaws, and installed it in a car...same length and output shaft spline.

I know that does not help the OP, but i never see the truck versions referred to when ratios are mentioned.

Grant
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