Automatic Transmission - 4F50N
- Specifications
- Description And Operation
- Transaxle Description
- Identification Tags
- Range Selection
- Shift Patterns
- Disassembled Views
- Bearing And Thrust Washer Locator
- Main Components And Functions
- Torque Converter
- GEARTRAIN
- Apply Components
- Hydraulic System
- Transaxle Electronic Control System
- Electronic System Description
- Electronic Ignition (EI) System
- Throttle Position (TP) Sensor
- Powertrain Control Module (PCM)
- Digital Transmission Range (TR) Sensor
- Brake Pedal Position (BPP) Switch
- Turbine Shaft Speed (TSS) Sensor
- Output Shaft Speed (OSS) Sensor
- Shift Solenoids (SSA, SSB, SSC)
- Transmission Fluid Temperature (TFT) Sensor
- Electronic Pressure Control (EPC) Solenoid
- Torque Converter Clutch (TCC) Solenoid
- Check Transaxle Light
- Mass Air Flow (MAF) Sensor
- Intake Air Temperature (IAT) Sensor
- Air Conditioning A/C Clutch
- Engine Coolant Temperature (ECT) Sensor
- Diagnosis And Testing
- Diagnostic Strategy
- Diagnostic Flow Chart
- Preliminary Inspection
- Road Testing Vehicle
- Shift Point Road Test
- Torque Converter Diagnosis
- Visual Inspection
- Diagnostics
- Transaxle Drive Cycle Test
- Diagnostic Trouble Code Charts
- Transaxle Connector Layouts
- Pinpoint Tests - Non OSC Equipped Vehicles
- Notes
- Digital Transmission Range (TR) Sensor Diagnosis Chart
- Wiggle Test Information for Open/Shorts
- Shift Solenoid Pre-Diagnosis
- Notes
- Solenoid Operation Chart
- Shift Solenoid Failure Mode Chart "Always Off"
- Shift Solenoid Failure Mode Chart "Always On"
- Pinpoint Test A: Shift Solenoid
- Pinpoint Test B: Transmission Fluid Temperature (TFT) Sensor
- Pinpoint Test C: Torque Converter Clutch (TCC) Solenoid
- Pinpoint Test D: Digital Transmission Range (Tr) Sensor
- Pinpoint Test E: Electronic Pressure Control (EPC) Solenoid
- Pinpoint Test F: Turbine Shaft Speed (TSS) Sensor
- Pinpoint Test G: Output Shaft Speed (OSS) Sensor
- Pinpoint Test H: Solenoid Mechanical Failure
- Special Testing Procedures
- Leakage Inspection
- Transmission Fluid Cooler
- Diagnosis By Symptom
- Notes
- Diagnosis by Symptom Chart Directions
- Diagnosis by Symptom Index
- Diagnostic Routines
- Engagement Concern: No Forward
- Engagement Concern: No Reverse
- Engagement Concern: Harsh Reverse
- Engagement Concern: Harsh Forward
- Engagement Concern: Delayed/Soft Reverse
- Engagement Concern: Delayed/Soft Forward
- Engagement Concern: No Forward And No Reverse
- Engagement Concern: Harsh Forward And No Reverse
- Engagement Concern: Delayed/Soft Forward And Reverse
- Shift Concerns: Some Or All Shifts Missing
- Shift Concerns: Timing - Early/Late
- Shift Concerns: Timing - Erratic/Hunting
- Shift Concerns: Feel - Soft/Slipping
- Shift Concerns: Feel - Harsh
- Shift Concerns: No 1ST Gear, Engages In Higher Gear
- Shift Concerns: No Manual 1ST Gear
- Shift Concerns: No 1-2 Shift (Automatic)
- Shift Concerns: No 2-3 Shift (Automatic)
- Shift Concerns: No 3-4 Shift (Automatic)
- Shift Concerns: No 3-2 Shift (Automatic)
- Shift Concerns: No 2-1 Shift (Automatic)
- Shift Concerns: Soft/Slipping 1-2 Shift (Automatic)
- Shift Concerns: Soft/Slipping 2-3 Shift (Automatic)
- Shift Concerns: Soft/Slipping 3-4 Shift (Automatic)
- Shift Concerns: Soft/Slipping 4-3 Shift (Automatic)
- Shift Concerns: Soft/Slipping 3-2 Shift (Automatic)
- Shift Concerns: Soft/Slipping 2-1 Shift (Automatic)
- Shift Concerns: Harsh 1-2 Shift (Automatic)
- Shift Concerns: Harsh 2-3 Shift (Automatic)
- Shift Concerns: Harsh 3-4 Shift (Automatic)
- Shift Concerns: Harsh 4-3 Shift (Automatic)
- Shift Concerns: Harsh 3-2 Shift (Automatic)
- Shift Concerns: Harsh 2-1 Shift (Automatic)
- Torque Converter Operation Concerns: No Apply
- Torque Converter Operation Concern: Always Applied/Stalls Vehicle
- Torque Converter Operation Concern: Cycling/Shudder/Chatter
- Other Concerns: No Engine Braking In 1ST Gear Manual 1ST Position
- Other Concerns: Shift Lever Efforts High
- Other Concerns: External Leaks
- Other Concerns: Poor Vehicle Performance
- Other Concerns: Noise/Vibration - Forward Or Reverse
- Other Concerns: Engine Will Not Crank
- Other Concerns: No Park Range
- Other Concerns: Transaxle Overheating
- General Procedures
- In-Vehicle Repair
- Transmission Fluid Drain And Refill
- Main Control - Pump
- Turbine Shaft Speed (TSS) Sensor
- Output Shaft Speed (OSS) Sensor - 3.0L DOHC
- Output Shaft Speed (OSS) Sensor - 3.0L MFI
- Differential Fluid Seals
- Digital Transmission Range (Tr) Sensor
- Transaxle Support Insulator - 3.0L 2V
- Transaxle Support Insulator - 3.0L 4V
- Removal
- Disassembly
- Disassembly And Assembly Of Subassemblies
- Chain Cover
- Pump Shaft
- Main Control Valve Body
- Pump Assembly
- Driven Sprocket Support
- Driven Sprocket
- Drive Sprocket/Turbine Shaft
- Sun And Shell Assembly - Disassembly
- Forward Clutch Cylinder
- Direct Clutch Cylinder
- Intermediate Clutch Cylinder
- Sun And Shell Assembly - Assembly
- Reverse Clutch
- Planet Assembly
- Low-Intermediate Clutch Cylinder
- Low-Intermediate One-Way Clutch
- Final Drive
- Overdrive Servo
- Coast Band Servo
- Neutral Drive Accumulator
- Torque Converter
- Torque Converter Cleaning And Inspection
- Torque Converter Flushing
- Torque Converter Leak Check
- Torque Converter End Play Check
- Assembly
- Installation