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: Tire Chains
Check local regulations before using tire chains. CAUTION Chains may affect handling. Do not go faster than 50 km/h (30 mph) or the chain manufacturer's recommended limit, whichever is lower. Drive carefully and avoid bumps, holes, and sharp turns. Avoid locked-wheel braking. Do not ...

Mazda 6 Service Manual: Service warnings
HANDLING REFRIGERANT Avoid breathing air conditioning refrigerant or lubricant vapor. Exposure may irritate eyes, nose and throat. Also, due to environmental concerns, we urge use of recovery/recycling/recharging equipment when draining R-134a from the air conditioning system. If accide ...