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 142 (AUTOMATIC TRANSAXLE - SERVICE, DIAGNOSIS & TROUBLESHOOTING)
2006 Chevrolet Cobalt SS, 4D Sedan, Standard
Section 142 (Automatic Transaxle - Service, Diagnosis & Troubleshooting)
2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Section 142 (Automatic Transaxle - Service, Diagnosis & Troubleshooting)
WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
- Troubleshooting
- Symptoms - Automatic Transmission
- Range Selector Displays Incorrect Range (3.6L)
- Range Selector Displays Incorrect Range (3.8L)
- Transmission Fluid Checking Procedure
- Line Pressure Check Procedure
- Road Test Procedure
- Torque Converter Diagnosis Procedure
- Torque Converter Replacement Guide
- Flexplate/Torque Converter Vibration Test
- Noise and Vibration Analysis
- Clutch Plate Diagnosis
- Engine Coolant/Water in Transmission
- Fluid Leak Diagnosis
- Case Porosity Repair
- Shift Solenoid Leak Test
- Automatic Transmission Oil Cooler Flushing and Flow Test (J45096)
- Automatic Transmission Oil Cooler Flushing and Flow Test (J35944-A)
- Automatic Transmission Fluid Leaks
- Incorrect Line Pressure
- Delayed Park to Reverse/Drive Engagement
- Harsh Park to Reverse/Drive Engagement
- Slips in Drive or No Drive
- Slips in Reverse or No Reverse
- Locked Up in Drive/Reverse
- No Park Range
- Harsh or Soft 1-2 Shift Feel
- Harsh or Soft 2-3/3-2 Shift Feel
- Harsh or Soft 3-4/4-3 Shift Feel
- High or Low Upshift or Downshift Speed
- First and Second Gear Only (2-3 Solenoid Stuck On)
- First and Fourth Gear Only (1-2 Solenoid Stuck On)
- Second and Third Gear Only (1-2 Solenoid Stuck Off)
- Third and Fourth Gear Only (2-3 Solenoid Stuck Off)
- First Gear Only
- Second Gear Only
- Third Gear Only
- Fourth Gear Only
- Slipping or No First Gear
- Slipping or No Second Gear
- Slipping or No Third Gear
- Slipping or No Fourth Gear
- No Engine Braking in Manual Second or Low Range
- Whine Noise Varying with RPM or Fluid Pressure
- Popping Noise
- Buzz Noise or High Frequency Rattle Sound
- Whine/Growl Noise That Changes with Vehicle Speed
- Final Drive Noise or Hum Noise
- Noise in First, Second, Third, or Fourth
- Noise in Random Ranges
- Abnormal Noise in Park or Neutral Range
- Converter Clutch Stuck On in All Gears
- Converter Clutch Stuck On in Second, Third and Fourth Gear
- Harsh Torque Converter Clutch (TCC) Apply or Release
- Converter Clutch Apply Rough, Slips, or Shudders
- No Torque Converter Clutch (TCC) Apply
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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.