I just went in for my 90K tune up service at my local Honda dealer. I had them also do a total body service which cleaned the carbon in the fuel injection system. After getting the car back, I notice a small subtle rumbling noise, a sound like the exhaust puffing away. So I went back to the dealer, and after their tech test drove it twice, said that my carrier bearings in the differential, the transmission, were going bad. Anyone have any information what might the caused be? Either poor workmanship or is it just wear and tear? The service advisor said it'll cost 5500 to repair the tranny. I called up American Honda and they said it might be just wear and tear. But I was thinking how can it be wear and tear when the car is in its prime. The car has 96000 miles on it, six years old, and I never experienced the noise before until after the service tune up yesterday. The car is a 1998 Honda Accord LX sedan. Any help is appreciated if anyone knows the cause of this and what the heck is going on. Thanks.