Those are 2 different engines. The first gen internal reverse HH transmissions are different then the second gen HH transmissions. The HH second gen trans with internal reverse is just like the Carbide trans used today. If you look under the CVT cover of the Carbide it will say Hammerhead in raised letters. The first Gen was a bolt on internal reverse the second gen was incorporated into the engine case. I don't see how you will make the first gen work in the second gen.
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