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certain transmissions i've come across DO NOT LIKE upshifting with the TCC locked(a very fast/firm upshift results). i can't speak for honda units in particular, but i would do temporary testing(jumper wires, for instance) before setting off on any permanant method.
a faster/firmer shift isn't necessarily a bad thing(less time with the clutches slipping = longer clutchplate life and lower trans temps), but there is a point of too quick to where you will start tearing up engine/trans mounts and possibly causing internal damage, depending on how stout the trans was made.
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