Automatic Transmission - Troubleshooting & Diagnosis

• Diagnostic Information & Procedures
  • Symptoms - Automatic Transmission
  • Range Selector Displays Incorrect Range
    • Notes
    • Circuit Description
    • Diagnostic Aids
    • Test Description
  • Tow/Haul Switch/Indicator Always On or Inoperative
    • Notes
    • Circuit Description
    • Diagnostic Aids
    • Test Description
  • Transmission Fluid Checking Procedure
  • Line Pressure Check Procedure
    • Tools Required
  • Road Test Procedure
    • Notes
    • Electrical Function Check
    • Upshift Control and Torque Converter Clutch (TCC) Apply
    • Part Throttle Detent Downshift
    • Full Throttle Detent Downshift
    • Manual Downshifts
    • Coasting Downshifts
    • Manual Gear Range Selection
  • Torque Converter Diagnosis Procedure
    • Notes
    • Torque Converter Stator
    • Poor Acceleration at Low Speed
    • Poor Acceleration at High Speed
    • Noise
    • Torque Converter Clutch Shudder
    • If Shudder Occurs During TCC Apply or Release
    • If Shudder Occurs After TCC has Applied
  • Flexplate/Torque Converter Vibration Test
    • Isolating Vibration
    • Indexing Torque Converter
  • Noise and Vibration Analysis
  • Clutch Plate Diagnosis
    • Composition Plates
    • Steel Plates
    • Causes of Burned Clutch Plates
  • Engine Coolant/Water in Transmission
  • Fluid Leak Diagnosis
    • General Method
    • Powder Method
    • Dye and Black Light Method
    • Find the Cause of the Leak
    • Possible Points of Fluid Leaks
  • Case Porosity Repair
  • Shift Solenoid Leak Test
    • Notes
    • Leak Test Procedure
  • Automatic Transmission Oil Cooler Flushing and Flow Test (J 45096)
    • Notes
    • Cooler Flow Check and Flushing Steps
    • Machine Set-up
    • Determine Minimum Flow Rate
    • Back Flush Procedure
    • Forward Flush
    • Flow Test
    • Code Recording Procedure
    • Clean-Up
  • Automatic Transmission Oil Cooler Flushing and Flow Test (J 35944-A)
    • Notes
    • Preparation
    • Back Flush
    • Forward Flush
    • Flow Test
    • Clean-up
  • Transmission Overheats
  • Oil Pressure High or Low
  • Harsh Shifts
  • Inaccurate Shift Points
  • First Gear Range Only - No Upshift
  • Slips in First Gear
  • Slipping or Harsh 1-2 Shift
  • No 2-3 Shift or 2-3 Shift Slips, Rough or Hunting
  • Second/Third Gear Only or First/Fourth Gears Only
  • No First or Second Gear/No Third or Fourth Gear
  • No Second Gear, No Fourth Gear, and No Reverse Gear
  • Third Gear Only
  • 3-2 Flare or Tie-Up
  • No 3-4 Shift, Slips or Rough 3-4 Shift
  • No Reverse or Slips in Reverse
  • No Part Throttle or Delayed Downshifts
  • Harsh Garage Shift
  • No Overrun Braking - Manual 3-2-1
  • No Torque Converter Clutch (TCC) Apply (300 RPM Slip)
  • Torque Converter Clutch (TCC) Shudder
  • No Torque Converter Clutch (TCC) Release
  • Torque Converter Clutch (TCC) Slip - 100 RPM Slip
  • Torque Converter Clutch (TCC) Slip with Stall/Stumble
  • Torque Converter Clutch (TCC) Intermittent - OK Cold/Slips Hot
  • No Fourth Gear, or Slips in Fourth Gear
  • Slip/Flare in Any Gear
  • No Third Gear
  • Drives in Neutral
  • Second Gear Start
  • No Park
  • Oil Out the Vent
  • Vibration in Reverse and Whining Noise in Park
  • Ratcheting Noise
  • Popping Noise
  • Whine Noise Varying with RPM or Fluid Pressure
  • Buzz Noise or High Frequency Rattle Sound
  • Noise in Random Ranges
  • No Drive in All Ranges
  • No Drive in Drive Range
  • Shift Lever Indicates Wrong Gear
  • No Gear Selection
  • Engine Starts in Gear
  • Delay in Drive and Reverse
  • Lack of Power or Hesitation