Mazda 6 Service Manual: No.9 abnormal shifting

No.8 does not shift to fourth gear (4gr)

No.10 frequent shifting

Other materials:

Mazda 6 Service Manual: Power window motor removal/installation
1. Disconnect the negative battery cable. 2. Remove the front door trim or rear door trim. 3. Disconnect the power window motor connector. 4. Remove the bolts. 5. Remove the power window motor from the power window regulator drum. 6. Install in the reverse order of removal. Note When ins ...

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: ...