Yes mine does the same but had it over 2 years now, mine is due to wear on the brass plates inside, took it to a mate that services reels for some local shops But unless you been winding a cod up the cliffs or give it some stick then this should not have happened yet.
By any chance have you had the reel apart and put soem of the spring washers etc back the wrong way?
If still causing problems and its in good conditon on the outside, always worth given Abu a ring, i had a problem with a 7000 Ld last year, rang them up about the drag lever and they sent me a new drag system to fit for the price of the p&p £1.20 if i remember right.