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BUSY BOLTERS Are you one?  The Shop Area
continues to pull in the most views on the Stovebolt. In August alone there were over 22,000 views in those 13 forums.
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Jul 21st, 2025 | | 
#26594 04/09/2005 1:55 AM | Joined: May 2004 Posts: 204 Member | | Member Joined: May 2004 Posts: 204 | Is a '66 C10 with the heavy duty 4 spd. a synchro or non synchro? What is the model name/number of this tranny?
Mike | | |
#26595 04/10/2005 6:33 PM | Joined: Nov 2004 Posts: 1,552 Shop Shark | | Shop Shark Joined: Nov 2004 Posts: 1,552 | On the left side (drivers side) of case below power take off or stamped on tag, retained by the two rear power take off screws. I looked up the numbers on mine in the 1960-1966 Chev/GMC Truck Factory Assembly Instruction Manual. I have a SM420 manufactured at the Muncie plant in Muncie, Indiana. Best of luck with identifying your tranny. | | |
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