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: Emission Control System
This vehicle is equipped with an emission control system (the catalytic converter is part of this system) that enables the vehicle to comply with existing exhaust emissions requirements. WARNING Never park over or near anything flammable: Parking over or near anything flammable, such as dry ...

Mazda 6 Service Manual: Valve clearance adjustment
1. Disconnect the negative battery cable. 2. Remove the tire (RH). 3. Remove the splash shield (RH). 4. Remove the spark plugs. (See SPARK PLUG REMOVAL/INSTALLATION.) 5. Remove the high-tension lead. 6. Remove the oil control valve (OCV) connector. 7. Remove the ventilation hose. 8. Remove th ...