Mazda 6 Service Manual: No.20 noise occurs at idle when vehicle is stopped in all positions/ranges

No.19 excessive shift shock on torque converter clutch (tcc)

No.21 noise occurs at idle when vehicle is stopped in d, s, l ranges, or in r position

Other materials:

Mazda 6 Service Manual: Vehicle speedometer sensor (vss) inspection
Visual Inspection 1. Remove the VSS. (See VEHICLE SPEEDOMETER SENSOR (VSS) REMOVAL/INSTALLATION.) 2. Make sure that the sensor is free of any metallic shavings or particles. If any are found on the sensor, clean them off. 3. Install the VSS. (See VEHICLE SPEEDOMETER SENSOR (VSS) REMOVAL ...

Mazda 6 Service Manual: Selector lever inspection
1. Turn the ignition switch to ON (engine OFF). 2. With the brake pedal depressed, verify that there is a "click" at each range when shifted. 3. Verify that the selector lever can be shifted. 4. Verify that there is a "click" at each position when shifted from P position to L range. 5. Ver ...