[blackrosenova400]

As far as fluid goes, the better protection it seems, the notchier the shifting is because of the lubricity of the fluid. Either way you lose.

If you look at the picture of the gears, the 4th gear on the left that is busted is most liklely the original that came with the transmission, which is the counter shaft, or intermediate shaft. The one on the right is on the input shaft, which should be the stronger gear (HD gear or Evo III), but it appears it is the culprit and took out the intermediate gear.