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: Fuse Panel Description
Fuse block (Engine compartment)           *Some models. Fuse block (Left side)         *Some models. ...

Mazda 6 Service Manual: Front oil seal
FRONT OIL SEAL REPLACEMENT 1. Disconnect the negative battery cable. 2. Remove the spark plugs. (See SPARK PLUG REMOVAL/INSTALLATION.) 3. Remove the Cylinder head cover. (See Cylinder Head Cover Installation Note.) 4. Remove the drive belt. (See DRIVE BELT REPLACEMENT.) 5. Remove the front dr ...