- Symptoms - Automatic Transmission

Symptoms - Automatic Transmission

Important: Use the symptom tables only if the following conditions are met:
^ Refer to Diagnostic Starting Point - Vehicle. Initial Inspection and Diagnostic Overview
^ There are no DTCs set.
^ The control modules can communicate via the serial data link.
^ Review the system operation in order to familiarize yourself with the system functions. Refer to Transmission General Description and Transmission Component and System Description.

Visual/Physical Inspection
Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections. Component Tests and General Diagnostics

Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

^ Fluid Diagnosis
- Transmission Fluid Checking Procedure 6L80-E Automatic Transmission
- Fluid Pressure High or Low Fluid Pressure High or Low
- Automatic Transmission Fluid Leaks Automatic Transmission Fluid Leaks
- Fluid Leak Diagnosis Fluid Leak Diagnosis

^ Noise and Vibration Diagnosis
- Whine/Growl Noise That Changes with Vehicle Speed Whine/Growl Noise That Changes With Vehicle Speed
- Noise in First or Reverse Gear Noise In First or Reverse Gear
- Noise in First, Second, Third, Fourth, Fifth, or Reverse Gear Noise In First or Reverse Gear
- Noise in First, Second, Sixth, or Reverse Gear Noise In First, Second, Sixth, or Reverse Gear
- Noise in Second or Sixth Gear Noise In Second or Sixth Gear
- Noise During 3-4 or 4-3 Shifts Noise During 3-4 or 4-3 Shifts
- Noise in Fourth, Fifth, or Sixth Gear Noise In Fourth, Fifth, or Sixth Gear
- Vibration Vibration
- Vibration in Second, Third, Fourth, Fifth or Sixth Gear Vibration In Second, Third, Fourth, Fifth or Sixth Gear
- Flexplate/Torque Converter Vibration Test Flexplate/Torque Converter Vibration Test
- Noise and Vibration Analysis Noise and Vibration Analysis

^ Range Performance Diagnosis
- No Park or Drive No Park or Drive
- No Drive in All Ranges No Drive In All Ranges
- No Reverse Gear No Reverse
- No Drive or Reverse Gear No Drive or Reverse Gear

^ Shift Quality Feel Diagnosis
- Harsh Garage Shift Harsh Garage Shift
- Harsh, Soft, Delayed or Slipping First or Reverse Gear Harsh, Soft, Delayed or Slipping First or Reverse Gear
- Harsh, Soft, Delayed or Slipping 1-2-3-4 Shift Harsh, Soft, Delayed or Slipping 1-2-3-4 Shift
- Harsh, Soft, Delayed or Slipping 4-5-6 Shift Harsh, Soft, Delayed or Slipping 4-5-6 Shift
- Harsh, Soft, Delayed or Slipping Third, Fifth, or Reverse Gear Harsh, Soft, Delayed or Slipping First or Reverse Gear
- Harsh, Soft, Delayed or Slipping Second or Sixth Gear Vibration In Second, Third, Fourth, Fifth or Sixth Gear

^ Shift Pattern
- No First Gear No First Gear
- No First and Reverse Gears No First and Reverse Gears
- No First, Second, Third, or Fourth Gear No First, Second, Third, or Fourth Gear
- No First, Second, Third, Fourth, Fifth, or Reverse Gear No First, Second, Third, Fourth, Fifth, or Reverse Gear
- No Second or Sixth Gear No Second or Sixth Gear
- No First, Second, Sixth, or Reverse Gear No First, Second, Sixth, or Reverse Gear
- No Fourth, Fifth, or Sixth Gear No Fourth, Fifth, or Sixth Gear
- No Third, Fifth, or Reverse Gear No Third, Fifth, or Reverse Gear
- Stuck in Second or Sixth Gear Stuck In Second or Sixth Gear
- Stuck in First or Reverse Gear Stuck In First or Reverse Gear

^ Torque Converter Diagnosis
- Torque Converter Diagnosis Procedure Torque Converter Diagnosis
- No Torque Converter Clutch (TCC) Apply No Torque Converter Clutch (TCC) Apply
- No Torque Converter Clutch (TCC) Release No Torque Converter Clutch (TCC) Release

^ Symptom Not Found or No Symptom Detected
- Transmission Fluid Checking Procedure 6L80-E Automatic Transmission
- Road Test Procedure Road Test Procedure
- Line Pressure Check Procedure Line Pressure Check Procedure