Difficulty getting into reverse

Hi folks, The car in question is a '05, 4.6 SOHC (MFI) with a manual transmission. Quite some time ago, I asked this group if anyone had any problems getting the transmission into reverse. Well, today I took the car in for the 30,000 mile check up, which included draining and refiling of the transmission. When the job was done I noticed as I was backing out of the parking spot the shifter went into reverse like it was new. I used reverse 4 times on the trip home and it worked great all times. Steve