For 1990-2009 cars

#### Functional Test Procedure (1998 U-van 4T60-E)

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Perform the Transmission Fluid Check . Is the fluid level correct? | -- | Go to Step 2 | --
2 | Check for PCM trouble codes, both current and history. Are PCM trouble codes present? | -- | Go to Diagnostic Trouble Code Identification | Go to Step 3
3 | Perform the Road Test . Was the condition duplicated? | -- | Go to Step 4 | Go to Step 12
4 | Is a harsh or soft shift condition present? | -- | Go to Step 7 | Go to Step 5
5 | Is the vehicle's performance poor? | -- | Go to the Torque Converter Evaluation portion of Torque Converter Clutch Evaluation and Diagnosis | Go to Step 6
6 | Is the engagement into Drive or Reverse delayed or missing? | -- | Go to Step 7 | Go to Step 9
7 | Perform the Line Pressure Check . Is the line pressure correct? | -- | Go to Step 8 | Go to the Symptom Diagnosis tables
8 | Inspect the transmission wire harness connectors and the transmission range switch. Was the condition found and corrected? | -- | System OK | Go to the Symptom Diagnosis tables
9 | Is vibration or noise a concern? | -- | Go to the Torque Converter/Flex Plate Vibration Test portion of Torque Converter Clutch Evaluation and Diagnosis | Go to Step 10
10 | Is the fluid leaking? | -- | Go to Fluid Leak Diagnosis and Repair | Go to Step 11
11 | Are other transmission conditions present? | -- | Go to the Symptom Diagnosis tables | Go to Step 12
12 | Was the condition corrected? | -- | System OK | Go to Step 1