Upshift Procedure
- Place the gear selector in Drive (D).
- Choose a percent throttle angle of 10 percent or 25 percent. Refer to Shift Speed .
- Set up the scan tool to monitor the throttle angle and the vehicle speed.
- Accelerate to the chosen throttle angle and hold the throttle steady.
- As the transaxle upshifts, note the shift speed and the commanded gear changes for each of these gears:
- Second gear
- Third gear
- Fourth gear
- Repeat steps 2-5 using several different throttle angles.
IMPORTANT:
Shift speeds may vary due to slight hydraulic delays responding to electric controls. A change from the original equipment tire size affects shift speeds.
Note when the torque converter clutch (TCC) applies. This should occur in fourth gear. If the apply is not noticed by a drop in RPM, refer to Torque Converter Diagnosis .
The lockup clutch should not apply unless the transaxle has reached a minimum operating temperature of 8°C (46°F) and an engine coolant temperature of 50°C (122°F).
Note when the torque converter clutch (TCC) applies. This should occur in fourth gear. If the apply is not noticed by a drop in RPM, refer to Torque Converter Diagnosis .
The lockup clutch should not apply unless the transaxle has reached a minimum operating temperature of 8°C (46°F) and an engine coolant temperature of 50°C (122°F).