Subaru 2009 IMPREZA Service Manual page 2072

Shock occurs when shifting from 2nd to 3rd gear.
Slippage occurs when shifting from 2nd to 3rd gear.
Shock occurs when shifting from 3rd to 4th gear.
Slippage occurs when shifting from 3rd to 4th gear.
Shock occurs when shifting from 3rd to 2nd gear.
Shock occurs when shifting from 2nd to 1st gear.
Diagnostics with Phenomenon
Symptom
4AT(diag)-87
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Problem parts
• TCM
• Torque converter turbine speed sensor
• Accelerator pedal position sensor
• 2-4 brake duty solenoid
• ATF temperature sensor
• Line pressure linear solenoid
• Low & reverse duty solenoid
• Control valve
• High clutch
• 2-4 brake
• ATF deterioration
• Engine performance
• High clutch duty solenoid
• TCM
• Accelerator pedal position sensor
• 2-4 brake duty solenoid
• ATF temperature sensor
• Line pressure linear solenoid
• Control valve
• High clutch
• 2-4 brake
• Low & reverse duty solenoid
• TCM
• Torque converter turbine speed sensor
• Accelerator pedal position sensor
• 2-4 brake duty solenoid
• ATF temperature sensor
• Line pressure linear solenoid
• Control valve
• Low clutch duty solenoid
• 2-4 brake
• ATF deterioration
• Engine performance
• TCM
• Acceleration pedal position sensor
• 2-4 brake duty solenoid
• ATF temperature sensor
• Line pressure linear solenoid
• Control valve
• 2-4 brake
• TCM
• Torque converter turbine speed sensor
• Accelerator pedal position sensor
• ATF temperature sensor
• Line pressure linear solenoid
• Control valve
• 2-4 brake duty solenoid
• 2-4 brake
• ATF deterioration
• High clutch duty solenoid
• TCM
• Torque converter turbine speed sensor
• Accelerator pedal position sensor
• ATF temperature sensor
• Line pressure linear solenoid
• Control valve
• Low & reverse clutch
• ATF deterioration
• 2-4 brake duty solenoid
• Low & reverse brake duty solenoid