Section 10 (Automatic Transmission - 5L40-E/5L50-E - Service, Diagnosis & Troubleshooting)

• Symptoms - Automatic Transmission
• Sport Mode Switch/Indicator Always On or Inoperative
  • Notes
  • Circuit Description
  • Diagnostic Aids
  • Test Description
• Winter Mode Switch/Indicator Always On or Inoperative
  • Notes
  • Circuit Description
  • Diagnostic Aids
  • Test Description
• Transmission Fluid Checking
• Line Pressure Check
• Road Test
  • 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
  • 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
• Buzz Noise or High Frequency Rattle Sound
• Whine Noise Varying with RPM or Fluid Pressure
• Popping Noise
• Noise in Random Ranges
• Clutch Plate Diagnosis
  • Composition Plates
  • Steel Plates
  • Causes of Burned Clutch Plates
• Engine Coolant/Water in Transmission
• Fluid Leak Diagnosis
  • Notes
  • 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
• Automatic Transmission Oil Cooler Flushing and Flow Test (J 35944-A)
  • Notes
  • Preparation
  • Back Flush
  • Forward Flush
  • Flow Test
  • Clean-up
• 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
• Slips or Shudders in First Gear
• No Drive in All Ranges
• No First Gear
• First Gear Only
• No Second Gear
• First and Second Gears Only
• First, Fourth, and Fifth Gears Only
• Second and Third Gears Only
• No Third Gear
• No Fourth Gear, or Slips in Fourth Gear
• Fifth Gear Only
• Harsh Shift 4 to 5, or 5 to 4
• Harsh Shift D to R
• Harsh Shifts
• Harsh Torque Converter Clutch Apply
• No Engine Braking in First, Second, and Third Gear
• No Engine Braking in First Gear
• No Engine Braking in Second Gear
• No Engine Braking in Third Gear
• Inaccurate Shift Points
• No Fifth Gear
• No Reverse or Slips in Reverse
• Slips while Shifting
• Degraded 1-2 and 2-1 Shifts
• Degraded 2-3 and 3-2 Shifts
• Degraded 4-5 Shift
• Drives with Selector Lever in Position N
• No Engagement of Torque Converter Clutch
• Fluid Pressure High or Low
• No Engine Braking
• Automatic Transmission Overheating