Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 471 (AUTOMATIC TRANSMISSION - 5AT - TROUBLESHOOTING)
2006 Chevrolet Cobalt SS, 4D Sedan, Standard
Section 471 (Automatic Transmission - 5AT - Troubleshooting)
2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Section 471 (Automatic Transmission - 5AT - Troubleshooting)
WARNING: This page is about a different car, the 2006 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
- Symptoms - Automatic Transmission
- Range Selector Displays Incorrect Range
- No Forward and Reverse
- No Drive in Forward Ranges
- Vehicle Does Not Move in Low Range
- No Reverse, or Forward Movement In Reverse
- Poor Acceleration, Flares on Start Off in Drive, Intermediate and Reverse
- High Stall Speed in Drive, Intermediate and Low
- Stall Speed High in Reverse
- Low Stall Speed
- Vibration at Idle
- Forward Motion in Neutral
- Delay in Shifting from Neutral to Drive and Intermediate Ranges
- Delayed Engagement into Reverse
- Transmission Does Not Shift
- Erratic Shift Quality
- Harsh Shifts
- Harsh 1-2 or 2-1 Shift Feel
- Harsh or Soft 2-3/3-2 Shift Feel
- Harsh or Soft 3-4/4-3 Shift Feel
- Harsh Shift 4 to 5, or 5 to 4
- Noise in All Ranges
- Vehicle Does Not Accelerate More Than 31 mph (50 km/h)
- Vibration in All Shift Lever Positions
- Shift Lever Does Not Operate Smoothly
- Transmission Does Not Shift into Park
- Torque Converter Clutch (TCC) Not Disengaging
- Harsh Torque Converter Clutch (TCC) Apply or Release
- No Torque Converter Clutch (TCC) Apply
- Shift Indicator Indicates Wrong Gear Selection
- Shift Speed Too Low
- Transmission Fluid Checking Procedure
- Line Pressure Check Procedure
- Road Test Procedure
- Torque Converter Diagnosis Procedure
- Stall Speed Test
- Clutch Plate Diagnosis
- Engine Coolant/Water in Transmission
- Fluid Leak Diagnosis
- Case Porosity Repair
- Automatic Transmission Oil Cooler Flushing and Flow Test
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.