Section 6 (Transfer Case - Mp 3023/3024-NQH)
WARNING: This page is about a different car, the 2014 GMC Yukon XL 1500, 2014 GMC Yukon, 2014 Chevrolet Tahoe, and 2014 Chevrolet Suburban 1500. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic Wiring Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Code Index
- DTC B0770: AWD Indicator
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC B0775: 4WD HI Indicator
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC B0780: 4WD LO Indicator
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC B0785: 2WD HI Indicator
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC B0790: Neutral Indicator
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC B2725: Active Transfer Case (ATC) Mode Switch
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC C0306: Motor A or B Circuit
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC C0321: Transfer Case Module Lock Circuit
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC C0374: General System Performance Temperature High
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC C0379: Front Axle System
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC C0387: Unable to Complete Shift Circuit
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC C0392: Rotational Position Sensor
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC C0396: Incremental Sensor
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC C0397: Transfer Case Clutch Performance Actuator
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC C0398: Incremental Sensor - Rotational Position Sensor Correlation
- Diagnostic Instructions
- DTC Descriptor
- Typical Scan Tool Data
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC C0550: Electronic Control Unit
- DTC C0569: System Configuration Error Calibration Not Learned
- DTC C0896: Device Voltage Range
- DTC P2160 or P2161: Vehicle Speed Sensor (VSS) 2
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Component Testing
- Repair Instructions
- DTC P279A: Four Wheel Drive (4WD) High Range Performance
- DTC P279B: Four Wheel Drive (4WD) Low Range Performance
- DTC P279C: Four Wheel Drive (4WD) Neutral Range Performance
- Symptoms - Transfer Case
- Front Axle Will Not Engage
- Front Axle Will Not Disengage
- Transfer Case Shift Control Switch Inoperative
- No Correction for Slip in All-Wheel Drive Mode
- Transfer Case Shift Control Switch Indicator Always On - Two or More
- Transfer Case Shift Control Switch Indicator Inoperative - One or More
- Service Indicator Always On
- Transfer Case High/Low Clutch Reset
- Transfer Case Popping Noise
- Transfer Case Banging Noise
- Transfer Case Whine or Rumble Noise
- Transfer Case Growl or Grinding Noise
- Transfer Case Grating Noise
- Transfer Case Clunk in 2HI Only
- Transfer Case Clunk in 4HI
- Transfer Case Clunk in 4LO
- Transfer Case Clunk During Acceleration and Deceleration
- Transfer Case Shudder or Binding
- Transfer Case Will Not Shift
- Transfer Case Jumps Out of Gear
- Transfer Case Leak Diagnosis
- Repair Instructions - On Vehicle
- Transfer Case Selector Switch Replacement (With SLT)
- Transfer Case Selector Switch Replacement (Without SLT)
- Transfer Case Shift Control Module Replacement
- Transfer Case Shield Replacement
- Transfer Case Fluid Replacement
- Drain Plug Replacement
- Fill Plug Replacement
- Transfer Case Two/Four Wheel Drive Actuator Position Sensor Replacement
- Transfer Case Two/Four Wheel Drive Actuator Replacement
- Vehicle Speed Sensor Replacement
- Front Output Shaft Seal Replacement
- Rear Output Shaft Seal Replacement
- Transfer Case Rear Extension Bushing Replacement
- Transfer Case Assembly Replacement
- Transfer Case Adapter Replacement
- Input Shaft Seal Replacement
- Repair Instructions - Off Vehicle
- Transfer Case Disassemble
- Transfer Case Holding Fixture Installation
- Access Hole Plugs, Fill and Drain Plug, Vent, 2/4 Wheel Drive Actuator, Actuator Shaft Position Sensor, and Vehicle Speed Sensor Removal
- Rear Output Shaft Seal and Bushing Removal
- Transfer Case Rear Case Half Removal
- Oil Pump Suction Pipe and Actuator Shaft Gear Removal
- Shift Fork Assembly, Drive Chain, and Rear Output Shaft Assembly Removal
- Rear Output Shaft Assembly Disassemble
- Input Shaft Oil Seal Removal
- Input Shaft and Planetary Assembly Removal
- Front Output Shaft Assembly Removal
- Transfer Case Front Half Cleaning and Inspection
- Transfer Case Rear Half Cleaning and Inspection
- Oil Pump Cleaning and Inspection
- Rear Output Shaft Cleaning and Inspection
- Front Output Shaft and Input Shaft Cleaning and Inspection
- Drive Chain, Drive Sprocket, and Driven Sprocket Cleaning and Inspection
- High/Low Planetary Carrier Cleaning and Inspection
- High/Low Shift Components Cleaning and Inspection
- Two/Four Wheel Drive Shift Components Cleaning and Inspection
- Transfer Case Four Wheel Drive Actuator Lever Shaft Bearing Replacement - Front
- Transfer Case Four Wheel Drive Actuator Lever Shaft Bearing Replacement - Rear
- Input Shaft Pilot Bearing Replacement
- Front Output Shaft Front and Rear Bearing Replacement
- Front Output Shaft Drive Sprocket Bearing Replacement
- High/Low Shift Fork Replacement
- Transfer Case Assemble
- Input Shaft and Planetary Assembly Installation
- Measuring Clutch Pack Height
- Clutch Assembly Installation
- Measuring/Adjusting Clutch Assembly Height
- Clutch Pressure Plate Installation
- Rear Output Shaft Assembly
- Shift Fork Assembly, and Rear Output Shaft Assembly Installation
- Front Output Shaft Assembly, Drive Chain, Actuator Shaft Gear, and Oil Pump Suction Pipe Installation
- Transfer Case Rear Case Half Installation
- Rear Output Shaft Seal and Bushing Installation
- Access Hole Plugs, Fill and Drain Plug, Vent, 2/4 Wheel Drive Actuator, Actuator Shaft Position Sensor, and Vehicle Speed Sensor Installation
- Input Shaft Seal and Front Output Shaft Seal Installation
- Transfer Case Disassemble
- Description and Operation
- Transfer Case Identification
- Transfer Case Description and Operation
- Notes
- Transfer Case Shift Control Switch
- 2WD Mode Power Flow
- 4HI Mode Power Flow
- 4HI Mode Active Power Flow
- 4LO Mode Power Flow
- NEUTRAL Mode Power Flow
- Service 4 Wheel Drive Message
- Transfer Case Two/Four Wheel Drive Incremental Sensor
- Transfer Case Two/Four Wheel Drive Actuator Assembly
- Transfer Case Actuator Shaft Position Sensor Assembly
- Transfer Case Motor Lock
- Transfer Case Shift Control Module
- Vehicle Speed Sensor (VSS)
- New Product Information
- Notes
- Input Shaft Seal Installer Revisions
- Interim Model Year Design Change - NQF/NQG/NQH/NPO Front Output Shaft, Deflector, Seal
- Service Parts Release Usage Change - NQH/NPO Control Actuator Levers
- Interim Model Year Design Change - NQG High/Low Shift Fork, Fork Pad, and High/Low Clutch
- Interim Model Year Design Change - NQF/NQG/NQH Front Case Half Assembly, Input Shaft, Planetary Carrier High/Low Clutch
- Production Assembly Breakpoints
- Magna Light Duty NQG/NQH/NP0 - First Design
- Magna Light Duty NQG/NQH/NP0 - Second Design
- Magna Heavy Duty NQF/NQG/NQH - First Design
- Magna Heavy Duty NQF/NQG/NQH - Second Design
- Front Case Half Identification
- Input Shaft Identification
- High/Low Planetary Carrier Assembly Identification
- High/Low Clutch
- Component Replacement - Conversion from First Design to Second Design
- 2014 NQH/NPO/NQG-LD Model Year Design Change - Addition of a Tuned Vibration Adapter (dampener) for V-6 Engine RPO LV3 Applications
- 2015 NQH/NPO/NQG-LD Model Year Design Change - Addition of a NEW design Propshaft Oil Sleeve
- Special Tools and Equipment