Floridaboy, HatchHero, myself, and many others have all used the GM sycromesh friction modified in my B-series tranny,H-series and fixed a serious grind like literaly 4 of the gears were grinding and even the honda manual tranny fluid couldn't do shit....highly reccommended when its your last resort better gambling $20-25 for a fluid that may save you $500-600 to open up the tranny and start replacing shit, use it if it grinds, if your tranny does not grind just leave it alone IMO