Section 751 (Transfer Case - Four Wheel Drive (4WD) Systems -- F250-F550 Super Duty)
WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Description And Operation
- Diagnosis And Testing
- Four Wheel Drive (4WD) Systems - Mechanical Shift
- Notes
- Principles of Operation
- Inspection and Verification
- Symptom Chart - Mechanical Shift
- Pinpoint Tests
- Pinpoint Test A: The Instrument Cluster 4x4 And Low Range Indicators Do Not Operate Correctly/Do Not Operate
- Pinpoint Test B: The Transfer Case Does Not Shift Between 2H And 4H Modes Correctly
- Pinpoint Test C: The Vehicle Does Not Shift Between 4H And 4L Modes Correctly
- Pinpoint Test D: The 4x4 System Jumps Out Of Gear
- Pinpoint Test E: Straightline Driveline Wind-up
- Pinpoint Test F: Mechanical Shift On Stop (MSOS) Functional Test
- Four Wheel Drive (4WD) Systems - Electronic Shift
- Notes
- Principles of Operation - Electronic Shift on the Fly (ESOF) System
- Electronic Shift Transfer Case
- Inspection and Verification
- Four-Wheel Drive (4WD) Diagnostic Trouble Code (DTC) Index
- Symptom Chart
- Pinpoint Tests
- Pinpoint Test G: No Communication With the 4x4 Module (GEM)
- Pinpoint Test H: The Instrument Cluster 4x4 And Low Range Indicators Do Not Operate Correctly/Do Not Operate
- Pinpoint Test I: The Front Axle Does Not Engage/Disengage Correctly
- Pinpoint Test J: The Transfer Case Does Not Shift Between 2H And 4H Modes Correctly
- Pinpoint Test K: Low to High (Clockwise)/High to Low (Counterclockwise) Relay Circuitry Functional Test
- Pinpoint Test L: The Vehicle Does Not Shift Between 4H And 4L Modes Correctly
- Pinpoint Test M: 4WD Does Not Engage At Speed Correctly
- Pinpoint Test N: The 4x4 System Jumps Out Of Gear
- Pinpoint Test O: Straightline Driveline Wind-up
- Pinpoint Test P: Electronic Shift On The Fly (ESOF) Functional Test
- Pinpoint Test Q: Transmission 4-Wheel Drive Mode Select Switch Failure
- Four Wheel Drive (4WD) Systems - Mechanical Shift
- General Procedures
- Removal And Installation