Section 2339 (Transfer Case - Four-Wheel Drive (4WD) System - Diagnostics -- F250-F550 Super Duty)
WARNING: This page is about a different car, the 2009 Ford Pickup, 2009 Ford F550 Super Duty, 2009 Ford F450 Super Duty, and 2009 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Description And Operation
- Diagnostic Tests
- 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 (IC) 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 4WD System Jumps Out of Gear
- Pinpoint Test E: Straight-line 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
- Pulse Vacuum Hub locks
- Hub lock Operation
- Hub lock Engagement/Disengagement Time
- Manual Override
- Hub lock Replacement
- Inspection and Verification
- Symptom Chart - Electronic Shift
- Pinpoint Tests
- Pinpoint Test G: The Instrument Cluster (IC) 4X4 High and 4X4 Low Range Indicators Do Not Operate Correctly/Do Not Operate
- Pinpoint Test H: The Front Axles Do Not Engage/Disengage Correctly
- Pinpoint Test I: The Transfer Case Does Not Shift Between 2WD and 4X4 High Modes Correctly
- Pinpoint Test J: Low to High (Clockwise)/High to Low (Counterclockwise) Relay Circuitry Functional Test
- Pinpoint Test K: The Vehicle Does Not Shift Between 4X4 High and 4X4 Low Modes Correctly
- Pinpoint Test L: 4WD Does Not Engage at Speed Correctly
- Pinpoint Test M: The 4WD System Jumps Out of Gear
- Pinpoint Test N: Straight-line Driveline Wind Up
- Pinpoint Test O: Electronic Shift-On-The-Fly (ESOF) Functional Test
- Pinpoint Test P: Transmission Four Wheel Drive (4X4) Mode Select Switch Failure
- Four Wheel Drive (4WD) Systems - Mechanical Shift
- General Procedures
- Removal And Installation