Mazda 6 Service Manual: No.13 no kickdown

No.12 torque converter clutch (tcc) non-operation

No.14 engine flares up or slips when upshifting or downshifting

Other materials:

Mazda 6 Service Manual: Intermittent concern troubleshooting
  Vibration Method 1. If malfunction occurs or becomes worse while driving on a rough road or when engine is vibrating, perform the steps below. Note There are several reasons vehicle or engine vibration could cause an electrical malfunction. Some of the things to check for are: ...

Mazda 6 Service Manual: Trunk lid removal/installation
Warning Removing the stay damper without supporting the trunk lid can be dangerous. The trunk lid may fall and injure you. Open the trunk lid fully and support it before removing the stay damper. 1. Disconnect the negative battery cable. 2. Disconnect the trunk lid harness connector, p ...