To those who don't know, last year or late 2011 I have put another gearbox in my MB3 which is from a 2000 1.6 Civic Coupe. The code casted on the gearbox is B000 P9A. Just recently I had trouble getting it into 2nd and 3rd gear. It only does this when I'm gearing down. It does it when driving it easy or hard. I can be driving in 4th and when I want to slow down and go into 3rd, it's nearly impossible! It doesn't crunch or grind, it just simply won't go into gear! It's got Honda MTF oil in and I have checked the levels. One thing I didn't do is change the clutch when I fit the 1.6 gearbox. Could it be a weak clutch or maybe clutch fluid? Thanks for reading and thanks in advance