[roadracer311]

The only way I can see that a short shift kit would harm a transmission, is if someone decides after they install it, to shift more quickly than they should.

All a short shift kit does is decreases the leverage at the shift lever, which also decreases the distance that the driver's hand moves. So the *only* possible effect this could have on the longevity of the transmission, is if it results in people trying to rush the synchros when they are shifting. To which I say: "Don't do that". As long as you don't shift faster than the synchros can go, everything will be exactly as it was with a standard shifter.

I've installed two of these (one Chinese knock-off and one 987 short shifter).