hey mate, ive had the same problems with my 4AFC box, i was thinking that it would only be the clutch, but i changed mine and it still does it. it has actually got a lot worse lately, especially 2nd to 3rd syncros. just wished i had of put another box in when i did the clutch, as now i have to pull this one out again. i reakon best off getting another box and clutch, and see how she goes