i've recently been getting a "marble in a can" sort of noise from under the gear stick when revs are low. It seems to happen when revving as well, upto about 2k before it goes away. Clutch in and out does make a tiny difference to noise. The noise irritates me, but the car is still fine. any ideas?
The car is a mk1.5 Focus 2004 1.6L iB5 trans with 40k mls