Possible causes of shocks when shifting gears in a Subaru Forester automatic transmission:
1. Low automatic transmission fluid level: Insufficient fluid level can lead to insufficient lubrication and poor transmission performance.
2. Contaminated or old automatic transmission fluid: Over time, automatic transmission fluid becomes contaminated and loses its lubricating properties. Dirty or old fluid can cause increased friction and shock.
3. Faulty automatic transmission solenoids: The solenoids control the gears in the automatic transmission. A faulty solenoid may shift gears incorrectly or cause jerking.
4. Faulty automatic transmission valve body: The valve body distributes automatic transmission fluid throughout the transmission. A faulty valve body can cause shifting problems and jerking.
5. Wear of friction discs: Friction discs are used to change gears in automatic transmissions. Worn friction discs can slip, causing vibrations.
6. Faulty torque converter: The torque converter transfers power from the engine to the transmission. A faulty torque converter may cause vibration or jolting.
7. Electronic problems: Electrical problems, such as a faulty sensor or wiring, can affect the operation of the automatic transmission and cause jerking.
8. Engine Mount Problem: Faulty or worn engine mounts can allow the engine and transmission to move excessively, resulting in jerky shifting.
Tips for eliminating shocks:
* Check the level and condition of the automatic transmission fluid and replace it if necessary.
* Check and replace faulty solenoids or valve body.
* Overhaul or replace worn friction discs.
* Check and repair the faulty torque converter.
* Find and repair electrical faults.
* Replace faulty engine mounts.
If you experience shifting shock in your Subaru Forester, it is recommended that you take it to a qualified mechanic for diagnosis and repair. Delay in fixing the problem can result in more serious damage and costly repairs.