I have a similar problem in my Mk3 Fiesta. My CTS gearbox was new last June, and has almost done 4,000 miles, with an AP 4 paddle clutch. From the beginning it was a bit sticky going into gear, and hasn't improved. I've fully rebuilt the gear linkage with all new parts from Ford, use the fully synthetic oil CTS recommended, have carried out the manual adjust clutch pedal mod as recommended by AP, and it just doesn't shift slickly. It's killing my times...went to Brunters two weeks ago and could only manage a 7.3 0-60 and 15.03 quarter I just can't get the car to perform to its potential. 230bhp in a Fiesta should mean sub 6.5 seconds with ease!