Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks


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#387169 04/06/17 03:04 PM
Joined: Sep 2010
Posts: 168
37ryan Offline OP
Shade Tree Mechanic
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Shade Tree Mechanic
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Posts: 168
I have a 3 speed, open driveshaft transmission with the "old style" bell hsg bolt pattern. The input shaft has 10 tooth and output has 16 teeth. I/O gear ratios are as follows: 1:1, 1.75:1, 2.75:1, reverse 3:1. The transmission was bought to update a '37 chev drivetrain, but the project got cancelled. It is in very good condition, always stored inside, and will be up for sale here as soon as it is identified. Thanks in advance for any info.

Filling Station - Chevrolet & GMC Reproduction Parts


Filling Station


37ryan #387170 04/06/17 03:18 PM
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Are there any casting numbers (raised numbers) on the out side of the case?


Gene Schneider
Joined: Sep 2010
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37ryan Offline OP
Shade Tree Mechanic
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Posts: 168
The shift cover has 3686832 GM, the gear housing has : GM 27 3743368 F129 the casting number on the tailshaft is illegible. I misspoke, the bell housing bolt pattern the the new style with the larger dia front bearing retainer pilot dia

Last edited by 37ryan; 04/06/17 03:44 PM.
37ryan #387182 04/06/17 05:41 PM
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The is a 1958 and up full sized car 3 speed. The ratios would be 2.94 for low and 1.68 for 2nd gear.


Gene Schneider

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