Mazda 6 Service Manual: No.19 excessive shift shock on torque converter clutch (tcc)

No.18 excessive shift shock is felt when upshifting and downshifting

No.20 noise occurs at idle when vehicle is stopped in all positions/ranges

Other materials:

Mazda 6 Service Manual: Driving on Uneven Road
Your vehicle's suspension and underbody can be damaged if driven on rough/uneven roads or over speed bumps at excessive speeds. Use care and reduce speed when traveling on rough/uneven roads or over speed bumps. Use care not to damage the vehicle's underbody, bumpers or muffler(s) when driving ...

Mazda 6 Service Manual: Front door speaker removal/installation
1. Disconnect the negative battery cable. 2. Remove the front door trim. 3. Remove in the order indicated in the table. 4. Install in the reverse order of removal. Front Door Speaker Installation Note Attach the speaker with the wiring harness placed in the groove of the door unit panel. ...