Section 1738 (Automatic Transmission - ALLISON - 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
- Functional Test
- Transmission Fluid Level and Condition Check
- Line Pressure Check
- Obtaining Diagnostic Trouble Codes
- Clutch Test
- FastLearn Procedure
- Limp Home Mode
- Road Test
- Torque Converter Diagnosis
- Flex Plate/Torque Converter Vibration Test
- Noise and Vibration Analysis
- Fluid Leak Diagnosis
- Case Porosity Repair
- Transmission Fluid Cooler Flushing and Flow Test
- Bushing and Mating Shaft Inspection
- Excessive Slippage and Clutch Chatter
- Fluid Leaks from Fluid Fill Tube and/or Vent
- Fluid Leaks from Transmission Input
- Fluid Leaks from Transmission Output
- Intermittent Buzzing Noise
- Low Main Line Pressure in All Ranges
- Low Main Line Pressure in Specific Ranges, Normal Pressure in Other Ranges
- Low Lubrication Pressure
- Contaminated Transmission Fluid
- Excessive Flare - Engine Overspeed on Wide-Open Throttle
- High Stall Speeds (Stall in Ranges 1-6)
- Low Stall Speeds (Stall in Ranges 1-6)
- Transmission Will Not Make a Specific Shift
- Transmission Will Not Stay in Forward or Reverse
- Transmission Will Not Shift to Forward or Reverse
- Transmission Overheats
- Transmission Does Not Shift Properly
- Abnormal Activities or Responses