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: Accessory Sockets
Only use genuine Mazda accessories or the equivalent requiring no greater than 120 W (DC 12 V, 10 A). Front The ignition must be switched to ACC or ON. Center The accessory sockets can be used regardless of whether the ignition is on or off. CAUTION To prevent accessory socket damag ...

Mazda 6 Service Manual: Hold switch removal/installation
1. Disconnect the negative battery cable. 2. Remove the console. 3. Disconnect the connector and remove the HOLD switch terminals. (See SELECTOR LEVER DISASSEMBLY/ASSEMBLY.) 4. Remove the selector lever knob component. 5. Remove the HOLD switch. 6. Install the HOLD switch to selector lever k ...