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64(THM)-65 and 66-67 Crankshaft differences

Started by Jeffrey Burland, January 28, 2012, 11:02:45 PM

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Jeffrey Burland

January 28, 2012, 11:02:45 PM
I know the 64 hydramatic crank is different. I'm concerned with the 64 THM to 65 and the 66-67 crank differences. Why and how are they different? thanks, Jeff
Jeff Burland, Just one guy with too many 54-76 restorables and parts to list
https://www.facebook.com/WillingtonCadillac/

Jeffrey Burland

#1
December 18, 2023, 10:40:16 PM
Any takers 11 years later?
Jeff Burland, Just one guy with too many 54-76 restorables and parts to list
https://www.facebook.com/WillingtonCadillac/

Joe G 12138

#2
December 20, 2023, 08:16:50 AM
     I'm happy to see you've revived this topic, Jeff. I've never been able to get a straight answer to this myself. I've been hoarding (and moving around) a NOS 66/67 Crankshaft for years for a possible spare for my '65 if I ever need it, not knowing for sure if I can even use it.
     Like I said, I've never found a positive answer on the differences just "maybe's". I had one suggestion that the part number change was possibly due to GM changing from cast to forged construction or vice versa that year. I never investigated further on that aspect.
     I would be nice to know. Joe Gibeault
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