I recently installed the Royal purple max gear into my tranny fluid and rear differential. The first day testing went awesome. Everything shifted really smoothly. Into first and reverse without the usual clicking noises. I noticed however when downshifting into first that the syncros make alot more noise and shifts are as smooth when matching speeds. I think my syncros aren't working as well as they did with the stock fluid.
After about a week the shifting seems to be the way it was with the stock fluid, not better not worse.
I guess it's just a "peace of mind" to know i cleaned out all the ugly metal that was on the magnet transmission bolt and rear differential magnetic bolt.
Today (9/5/03) i will install the Kartboy SS and bushings and bushings when i get out of work. I post reviews.