I have a 406 hdi 110 se estate. in 3rd, 4th and 5th gear the gearbox whines. after about 10 miles it gets worse. It is most noticable in 4th gear at about 28-30mph. Peugeot garage told me its normal for 406 and 306 but I dont believe that. This car is 12 months old and has only done 8000 miles. Can anybody give me any advice. The car still has over 2 years manufacturers warranty on it. Thanks Paul.