I have a 1990 Accord Ex that just started making a grinding noise from up front of the vehicle. There is is no vibration felt on the steering wheel and the Automatic shifting feels very smooth. I notice this noise when the speed gets to about 20 and then as I go faster, the noise pitch goes up. The car has 190K and has never been wrecked. I just did a fluid change with 3 Qts of Honda ATF-Z1 tranny fluid. No change after that was done. I also checked the Transaxles in the parking lot and heard no clicking when making hard left or right turns at about 15-20 Mph. Any thoughts on where to start. Wheel bearings? Tranny? Transaxles?