Section 990 (Four Wheel Drive Systems)
WARNING: This page is about a different car, the 2004 Mercury Mountaineer and 2004 Ford Explorer. 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 Systems - AWD
- Four-Wheel Drive Systems - Electronic Shift
- Notes
- Special Tool(s)
- Inspection and Verification
- 4x4 Control Module (PCM) Diagnostic Trouble Code (DTC) Index
- Symptom Chart
- Connector Circuit Reference
- 4x4 Module (PCM) C175b
- 4x4 Module (PCM) C175t
- Brake On/Off (BOO) Switch C278 (2-Speed Torque On Demand [TOD])
- Transmission Range (TR) Sensor C167 (2-Speed Torque On Demand [TOD])
- Mode Select Switch (MSS) C284 (2-Speed Torque On Demand [TOD])
- Transfer Case C350 (2-Speed Torque On Demand [TOD])
- Transfer Case Clockwise (CW) and Counterclockwise (CCW) Relays C1173/C1129
- Neutral Tow Switch C2260
- Pinpoint Tests
- Pinpoint Test A: No Communication With The 4x4 Module (PCM)
- Pinpoint Test B: The Vehicle Does Not Shift Between 4WD Auto and 4H Correctly
- Pinpoint Test C: The 4WD Indicators Do Not Operate Correctly/Do Not Operate/Flash
- Pinpoint Test D: Straightline Driveline Wind-up
- Pinpoint Test E: The Vehicle Does Not Shift Between 4-Wheel Drive Auto and 4L Correctly
- Pinpoint Test F: 4WD System Functional Test
- Pinpoint Test G: Neutral Tow Functional Test
- Pinpoint Test H: The Vehicle Binds In Turns/Resists Turning/Pulsates/Shudders In a Straight Line
- General Procedures
- Removal And Installation
- Disassembly And Assembly
- Transfer Case - AWD
- Notes
- Item 1: Output Flange Nut Disassembly Note
- Item 6: Case Disassembly Note
- Item 7: Upper Output Shaft and Ring Gear Disassembly Note
- Item 15: Bearing Disassembly Note
- Item 21: Upper Drive Sprocket Disassembly Note
- Item 28: Bearing Disassembly Note
- Item 29: Snap Ring Disassembly Note
- Item 32: Bearing Disassembly Note
- Item 33: Seal Assembly Note
- Item 32: Bearing Assembly Note
- Item 28: Bearing Assembly Note
- Item 24: Lower Drive Sprocket Assembly Note
- Item 10: Yoke to Flange Seal Assembly Note
- Item 7: Upper Output Shaft and Ring Gear Assembly Note
- Item 6: Case Assembly Note
- Item 1: Output Flange Nut Assembly Note
- Transfer Case - Electronic Shift
- Notes
- Item 1: Rear Output Shaft Flange Nut Disassembly Note
- Item 5: Oil Seal Disassembly Note
- Item 6: Connector Interlock Disassembly Note
- Item 9: Transfer Case Shift Motor Disassembly Note
- Item 12: Transfer Case Cover Disassembly Note
- Item 13: Front Output Shaft Rear Bearing Disassembly Note
- Item 14: Rear Output Shaft Support Bearing Disassembly Note
- Item 18: Clutch Coil Assembly Disassembly Note
- Item 24: Clutch Pack Assembly Disassembly Note
- Item 26: Drive Chain Disassembly Note
- Item 31: Rear Output Shaft and Oil Pump Assembly Disassembly Note
- Item 32: Electric Shift Cam, Torsion Spring and Shift Shaft Disassembly Note
- Item 33: High-Low Collar Disassembly Note
- Item 36: Front Planetary Gear Set Assembly Disassembly Note
- Item 39: Snap Ring Disassembly Note
- Item 41: Oil Seal Disassembly Note
- Item 42: Front Output Shaft Support Bearing Disassembly Note
- Item 44: Input Seal Disassembly Note
- Item 45: Output Shaft Bushing Disassembly Note
- Item 46: Bearing Disassembly Note
- Item 48: Planetary Gear Carrier Support Bearing Disassembly Note
- Item 48: Planetary Gear Carrier Support Bearing Assembly Note
- Item 46: Output Shaft Bearing Assembly Note
- Item 45: Output Shaft Bushing Assembly Note
- Item 44: Input Seal Assembly Note
- Item 43: Shifter Shaft Seal Assembly Note
- Item 42: Bearing Assembly Note
- Item 41: Oil Seal Assembly Note
- Item 34: Reduction Shift Fork Assembly Note
- Item 28: Drive Sprocket Assembly Note
- Item 24: Clutch Pack Assembly Note
- Item 19: Cam and Coil Housing Assembly Note
- Item 14: Rear Output Shaft Support Bearing Assembly Note
- Item 13: Front Output Shaft Rear Bearing Assembly Note
- Item 12: Cover Assembly Note
- Item 10: Bolt Assembly Note
- Item 9: Transfer Case Shift Motor Assembly Note
- Item 6: Connector Interlock Assembly Note
- Item 1: Rear Output Shaft Flange Nut Assembly Note
- Transfer Case - AWD