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 MANUALSCHEVROLET2013CORVETTE BASE, 2D CONVERTIBLE, STANDARD TRANS, TRANS MFR CD 6L85M/MM6REPAIR AND DIAGNOSIS (SINGLE PAGE)EXTERNAL PAGESDIFFERENT CARSECTION 154 (AUTOMATIC TRANSMISSION - 2ML70 - REMOVAL & INSTALLATION, SERVICE, OVERHAUL, TROUBLESHOOTING & DIAGNOSIS)
2013 Chevrolet Corvette Base, 2D Convertible, Standard Trans, Trans Mfr CD 6L85M/MM6
Section 154 (Automatic Transmission - 2ML70 - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis)
2013 Chevrolet Corvette Base, 2D Convertible, Standard Trans, Trans Mfr CD 6L85M/MM6SECTION Section 154 (Automatic Transmission - 2ML70 - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis)
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
- Diagnostic Information and Procedures
- Symptoms - Automatic Transmission
- Control Solenoid Valve and Transmission Control Module Assembly Inspection
- Control Solenoid Valve and Transmission Control Module Assembly Output Shaft Speed Input Test
- Control Solenoid Valve and Transmission Control Module Assembly Cleaning
- Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test
- Transmission Fluid Check
- Road Test
- Clutch Plate Diagnosis
- Engine Coolant/Water in Transmission
- Line Pressure Check
- Case Porosity Repair
- Transmission Fluid Cooler Flushing and Flow Test
- Bushing and Mating Shaft Inspection
- Main Fluid Pump Pressure High or Low
- Auxiliary Fluid Pump Pressure High or Low
- Automatic Transmission Fluid Leaks
- Fluid Leak Diagnosis
- Whine/Growl Noise That Changes with Vehicle Speed
- Noise in First or Reverse Gear
- Noise in First, Second, Third, Fourth, or Reverse Gear
- Noise in First, Second, or Reverse Gear
- Noise During 3-4 or 4-3 Shifts
- Noise in Second or Fourth Gear
- Noise in Fourth Gear
- Vibration
- Vibration in Second, Third, and Fourth Gear
- Noise and Vibration Analysis
- No Park or Drive
- No Drive in All Ranges
- No Reverse Gear
- No Drive or Reverse Gear
- Harsh Garage Shift
- Harsh, Soft, Delayed or Slipping First or Reverse Gear
- Harsh, Soft, Delayed or Slipping 1-2-3-4 Shift
- Harsh, Soft, Delayed, or Slipping Reverse Gear
- Shudder on Launch and/or Deceleration
- No First Gear
- No First and Reverse Gears
- No First, Second, Third, or Fourth Gear
- No Second Gear
- No First, Second, or Reverse Gear
- No Fourth Gear
- Stuck in Second Gear
- Stuck in First or Reverse Gear
- Repair Instructions - On Vehicle
- Auxiliary Fluid Pump Control Module Replacement
- Transmission Fluid Filler Tube and Seal Replacement
- Automatic Transmission Range Selector Lever Replacement
- Range Selector Lever Cable Replacement
- Range Selector Lever Cable Adjustment
- Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection
- Transmission Fluid Cooler Pipe Replacement
- Transmission Fluid Cooler Pipe Fitting Seal Replacement
- Vent Hose Replacement (2WD)
- Vent Hose Replacement (4WD)
- Automatic Transmission Fluid Pressure Test Hole Plug Replacement
- Transmission Fluid Pan Replacement
- Automatic Transmission Fluid Filter and Auxiliary Fluid Pump Filter Replacement
- Automatic Transmission Auxiliary Fluid Pump and Gasket Replacement
- Transmission Mount Inspection
- Transmission Mount Replacement
- Manual Shift Shaft Position Switch Replacement
- Manual Shift Shaft Seal Replacement
- Output Speed Sensor Replacement
- Wiring Harness Replacement
- Automatic Transmission Electrical Connector Passage Sleeve Replacement
- Control Solenoid Valve and Transmission Control Module Assembly Replacement
- Control Valve Upper Body Replacement
- Park Pawl Cover and Gasket Replacement
- Park Pawl and Actuator Replacement
- Output Shaft Seal Replacement
- Case Extension and Gasket Replacement
- Rear Case and Gasket Replacement (2WD)
- Rear Case and Gasket Replacement (4WD)
- Transmission Replacement
- Repair Instructions - Off Vehicle
- Holding Fixture Installation and Torque Dampener Removal
- Auxiliary Fluid Pump Removal
- Transmission Fluid Pan, Fluid Filter, and Auxiliary Fluid Pump Filter Removal
- Control Valve Assembly Removal
- Transmission Control Wiring Harness Extension Harness Removal
- Torque Dampener Housing Removal
- Input Shaft, Sun Gear Carrier, and Sun Gear Removal
- Drive Motor with Generator Assembly Removal - 1st Position
- Sun Gear Shaft, Sun Gear Carrier, 1-3 Clutch Housing, and Main Shaft Removal
- 4th Clutch Piston Removal
- Rear Case Removal
- Sun Gear and Sun Gear Shaft Removal
- Drive Motor with Generator Assembly Removal - 2nd Position
- Center Support Assembly Removal
- Manual Shift Shaft Position Switch Overhaul
- Manual Shift Shaft Seal Replacement
- Transmission Case Cleaning and Inspection
- Center Support Cleaning and Inspection
- Center Support Assembly Installation
- Drive Motor with Generator Assembly Cleaning and Inspection - 2nd Position
- Drive Motor with Generator Assembly Installation - 2nd Position
- Sun Gear and Sun Gear Shaft Installation
- Output Speed Sensor and Case Extension Removal
- Hybrid Low, 1-2 Clutch Piston Removal
- Sun Gear Carrier and Hybrid Direct, 2-3-4 Clutch Housing Removal
- Hybrid Direct, 2-3-4 Clutch Support Removal
- Park Pawl Replacement
- Hybrid Direct, 2-3-4 Clutch Support Installation
- Hybrid Direct, 2-3-4 Clutch Housing Overhaul
- Sun Gear Carrier and Hybrid Direct, 2-3-4 Clutch Housing Installation
- Hybrid Low, 1-2 Clutch Piston Installation
- Propeller Shaft Front Slip Yoke Oil Seal Replacement
- Output Speed Sensor and Case Extension Installation
- Rear Case Installation
- 4th Clutch Piston Installation
- 1-3 Clutch Housing Overhaul
- 1-3 Clutch Housing, Sun Gear Carrier, and Sun Gear Installation
- Main Shaft Installation
- Sun Gear Shaft Installation
- Drive Motor with Generator Assembly Cleaning and Inspection - 1st Position
- Drive Motor with Generator Assembly Installation - 1st Position
- Sun Gear Carrier and Sun Gear Installation
- Input Shaft Installation
- Torque Dampener Housing and Fluid Pump Cover Disassemble
- Fluid Pump Cover Cleaning and Inspection
- Torque Dampener Housing Cleaning and Inspection
- Transmission Fluid Pump Seal Replacement
- Transmission Fluid Cooler Pipe Fitting Seal Replacement
- Fluid Pump Selective Measurement
- Torque Dampener Housing and Fluid Pump Cover Assemble
- Fluid Pump Cover Installation
- Torque Dampener Housing and Fluid Pump Cover Installation
- Transmission Control Wiring Harness Extension Harness Installation
- Control Valve Assembly Disassemble
- Control Valve Assembly Assemble
- Control Valve Assembly Installation
- Automatic Transmission Electrical Connector Passage Sleeve Installation
- Transmission Fluid Pan, Fluid Filter, and Auxiliary Fluid Pump Filter Installation
- Auxiliary Fluid Pump Installation
- Holding Fixture Removal and Torque Dampener Installation
- Description and Operation
- Definitions and Abbreviations
- Transmission Identification Information
- Transmission General Description
- Transmission Component and System Description
- Transmission Adaptive Functions
- Transmission Indicators and Messages
- Electronic Component Description
- Wiring Harness Inline Connector Description
- Automatic Transmission Hydraulic Diagrams
- Park - Engine Running
- EVT Mode Reverse - Engine Running
- Neutral - Engine Running
- EVT Mode Low - Engine Running
- EVT Mode Low - Engine Off
- Drive Range, First Gear
- Drive Range, Second Gear
- Drive Range, Third Gear
- Drive Range - Fourth Gear
- EVT Mode High - From Drive Range 4th Gear
- Power Off Low Default
- Power Off High Default
- Fluid Passages
- Special Tools
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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.