Diagnostics of Mitsubishi Galant automatic transmission (American version)
1. Visual inspection:
* Check for transmission fluid leaks under the vehicle.
* Check the transmission fluid level and fluid color.
* Inspect the transmission housing for signs of damage or leaks.
2. Scan Trouble Codes (DTC):
* Connect the OBD-II scanner to the vehicle’s diagnostic connector.
*Read transmission related trouble codes.
* Interpret trouble codes to determine the possible cause of the problem.
3. Test drive:
* Take a test drive to evaluate the transmission’s performance under various conditions.
*Please note the following:
* smooth gear shifting
*slip
* jerks or shocks when changing gears
* delay when shifting gears
* extraneous noise from the transmission
4. Fluid pressure diagnostics:
*Use the transmission pressure gauge to check the fluid pressure under various operating conditions.
* Compare the measured pressure with the technical specifications.
5. Checking solenoids:
* Check the operation of the transmission solenoids using diagnostic equipment.
* Replace faulty solenoids.
6. Checking the torque converter:
* Remove the transmission pan to inspect the torque converter.
* Check for signs of wear or damage.
* If necessary, repair or replace the torque converter.
7. Checking electrical circuits:
* Check all transmission-related electrical circuits for opens, shorts, or resistance problems.
* Replace faulty components.
8. Transmission overhaul:
* If other diagnostic methods are unsuccessful, a transmission rebuild may be required.
* This is a complex and time-consuming process that requires special tools and knowledge.
Note:
* For detailed specifications and inspection procedures, please refer to the service manual for your specific year and trim level of Mitsubishi Galant.
* It is recommended that your transmission be diagnosed and repaired by a qualified mechanic.