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Makes 🢒 Cadillac 🢒 2001 🢒 Catera 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L30-E 🢒 Symptoms - Automatic Transmission

Symptom Diagnosis 2000 V Car 4L30-E

Diagnostic Category

Diagnostic Information

Important: The Road Test Procedure should be performed before beginning any diagnosis. If this procedure has not already been performed, refer to Road Test .

The following table consists of seven diagnostic categories that are located in the left-hand column of the table. Using this column, choose the appropriate category based on the operating conditions of the vehicle or transmission. After selecting a category, use the right-hand column to locate the specific symptom diagnostic information.

Fluid Diagnosis

This category contains the following topics:

    • Fluid condition (appearance, contaminants, smell, overheating)
    • Line pressure (high or low)
    • Fluid leaks
    • Refer to Transmission Fluid Check .
    • Refer to Line Pressure Check .
    • Refer to Fluid Leak Diagnosis .

Noise and Vibration Diagnosis

This category contains the following topics:

    • Noise (drive gear, final drive, whine, growl, rattle, buzz, popping)
    • Vibration
    • Refer to Torque Converter Diagnosis .
    • Refer to Rattling Noises in the Transmission .
    • Refer to Vibration in Second Gear .
    • Refer to Rattling in Torque Converter Clutch .

Range Performance Diagnosis

This category contains the following topics:

    • Engine will not start
    • Drives in neutral
    • No park
    • No reverse
    • No drive
    • No engine braking
    • No or incorrect gear selection
    • Refer to Selector Position P Will Not Engage .
    • Refer to Rear Wheels Locked .
    • Refer to No Reverse Gear .
    • Refer to No Engine Braking .
    • Refer to No Sport Program .
    • Refer to No Winter Program .
    • Refer to No Kickdown Program .

Shift Quality (Feel) Diagnosis

This category contains the following topics:

    • Harsh engagement (garage shifts)
    • Delayed engagement (garage shifts)
    • Shift shudder
    • Refer to Coarse Shifting from N to D .
    • Refer to Delay in Shifting from N to D .
    • Refer to Slips or Shudders in First Gear .

Shift Pattern

This category contains the following topics:

    • No upshifts
    • No downshifts
    • Slipping
    • Refer to Slips or Shudders in First Gear .
    • Refer to No 1-2 Upshift .
    • Refer to No 2-3 Upshift .
    • Refer to No 3-4 Upshift .
    • Refer to No Downshift Possible .

Shift Speed Diagnosis

This category currently has no information.

Currently no information

Torque Converter Diagnosis

This category contains the following topics:

    • Torque converter diagnosis
    • TCC does not apply
    • TCC does not release
    • Poor acceleration
    • Refer to Torque Converter Diagnosis .
    • Refer to Rattling in Torque Converter Clutch .
    • Refer to Poor Acceleration .

If No Symptom Found
    • Refer to Transmission Fluid Check .
    • Refer to Road Test .
    • Refer to Line Pressure Check .