Mazda 6 Service Manual: No.16 judder upon torque converter clutch (tcc) operation

No.15 engine flares up or slips when accelerating vehicle

No.17 excessive shift shock from n to d or n to r position/range

Other materials:

Mazda 6 Service Manual: Rear door lock actuator inspection
Door Lock Actuator 1. Disconnect the front door lock actuator connector. 2. Apply battery positive voltage to the front door lock actuator terminals and inspect the operation of the front door lock actuator. If not as specified, replace the front door lock actuator. With double locking ...

Mazda 6 Service Manual: Manually Shifting Up
You can shift gears up by operating the selector lever or the steering shift switches (some models). M1 → M2 → M3 → M4 → M5 → M6 Using selector lever To shift up to a higher gear, tap the selector lever back (+) once. Using steering shift switch (some models) To ...