my friend is a mechanic and put my quaife in, but he ran into a problem, he had never worked on a honda b4 and there was something that he did when he put the tranny back together he didnt align something right, and when i tried to shift into second it would grind and not go in, so he took it back apart and he ended up not aligning something right, he said it was so stupid, if you really wanna do it take your time and only do it if youve know how to get it back together