Section 1734 (Automatic Transmission - 6L45/6L50/6L80/6L90 - Symptom Troubleshooting And Diagnosis)
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Symptoms - Automatic Transmission
- Control Solenoid Valve and Transmission Control Module Assembly Inspection
- Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test
- Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test
- Service Fast Learn Adapts
- Tow/Haul Switch/Indicator Always On or Inoperative
- Transmission Fluid Level and Condition Check
- Line Pressure Check
- Road Test
- Torque Converter Diagnosis
- Torque Converter Stator
- Poor Acceleration at Low Speed - Stator Roller Clutch Freewheels at All Times
- Poor Acceleration at High Speed - Stator Roller Clutch is Locked Up at All Times
- Torque Converter Bearing Noise
- Torque Converter Clutch
- Torque Converter Clutch Shudder
- If Shudder Occurs During TCC Apply, Release, and ECCC
- If Shudder Occurs After TCC has Locked
- Torque Converter Vibration Test
- Isolating Vibration
- Indexing Torque Converter
- Flex Plate/Torque Converter Vibration Test
- Bushing and Mating Shaft Inspection
- Vibration
- Noise and Vibration Analysis
- Whine/Growl Noise That Changes with Vehicle Speed
- Noise in First or Reverse Gear
- Noise in First, Second, Third, Fourth, Fifth, or Reverse Gear
- Noise in First, Second, Sixth, or Reverse Gear
- Noise in Second or Sixth Gear
- Noise During 3-4 or 4-3 Shifts
- Noise in Fourth, Fifth, or Sixth Gear
- Clutch Plate Diagnosis
- Engine Coolant/Water in Transmission
- Fluid Leak Diagnosis
- Case Porosity Repair
- Transmission Fluid Cooler Flushing and Flow Test
- Automatic Transmission Fluid Leaks
- Shift Indicator Indicates Wrong Gear Selection
- No Park or Drive
- Harsh Garage Shift
- No Drive in All Ranges
- No First Gear
- No First and Reverse Gears
- Harsh, Soft, Delayed or Slipping First or Reverse Gear
- No First, Second, Third, and Fourth Gear
- Harsh, Soft, Delayed or Slipping 1-2-3-4 Shift
- No Second and Sixth Gear
- Harsh, Soft, Delayed or Slipping Second or Sixth Gear
- Vibration in Second, Third, Fourth, Fifth, or Sixth Gear
- No Third, Fifth, and Reverse Gear
- Harsh, Soft, Delayed or Slipping Third, Fifth, or Reverse Gear
- No Fourth, Fifth, and Sixth Gear
- Harsh, Soft, Delayed or Slipping 4-5-6 Shift
- No Torque Converter Clutch Apply
- No Torque Converter Clutch Release
- Harsh Torque Converter Clutch Apply, or Inoperative or No Electronically Controlled Capacity Clutch Control
- No Reverse Gear
- Fluid Pressure High or Low