Inspection of a 904 torqueflite

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They are the same 2.45 gear set and the diameter on everything is the same.

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The 67 is on the left. It has shorter teeth


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This is the 76 it has a ridge


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This is the 67......it’s smooth

Basically....I could use that 67 set if the teeth were a bit taller and accounted for that extra clutch pack to grab

Since the 67 is a 4/3 and the 76 is a 4/4. That forward clutch on the 76 has that extra clutch and needs those longer splines.
Agreed. 3 clutch and 4 clutch.