DEFINITION: While shifting from HI range to LO range, there is gear clashing, no HI range, or the transfer case will not shift from 4HI to 4HI Lock.

Review the Symptoms - Transfer Case and perform the necessary inspections.

Shift cam and shaft assembly

1. Inspect for the following conditions:

•	The shift cam for being worn

•	The shift shaft torsion spring for being faulty

•	Refer to Transfer Case Cleaning and Inspection .

2. Replace the following components if found faulty:

•	The shift cam

•	The shift shaft torsion spring

•	Refer to Transfer Case Disassemble and Transfer Case Assemble .

High/low range shift fork

1. Inspect the high low shift fork for the following conditions:

•	Worn shift fork pads

•	The roller on the shift fork for wear or damage

•	Cracked or bent shift fork

•	Refer to Transfer Case Cleaning and Inspection .

2. Replace the following components if found faulty:

•	The shift fork pads

•	The shift fork

•	Refer to Transfer Case Disassemble and Transfer Case Assemble .

Range sleeve

1. Inspect the range sleeve for the following conditions:

•	Engagement teeth for burrs or damage

•	Sliding freely on the mainshaft

•	The range sleeve shift fork collar for excessive wear

•	Refer to Transfer Case Cleaning and Inspection .

2. Replace the range sleeve if it is faulty. Refer to Transfer Case Disassemble and Transfer Case Assemble .

High/low planetary carrier

1. Inspect the high/low planetary engagement teeth for burrs or damage. Refer to Transfer Case Cleaning and Inspection .
2. Replace the high/low planetary carrier if it is faulty. Refer to Transfer Case Disassemble and Transfer Case Assemble .

Mainshaft front support bearing

1. Inspect for the following conditions:

•	Failed front mainshaft support bearing in the input gear

•	Journal on the mainshaft for excessive wear or damage

•	Refer to Transfer Case Cleaning and Inspection .

2. Replace the bearing if it is faulty. Refer to Transfer Case Disassemble and Transfer Case Assemble .
3. Replace the mainshaft if it is damaged. Refer to Transfer Case Disassemble and Transfer Case Assemble .

Lockup shift collar assembly

1. Inspect the lockup shift collar assembly for the following conditions:

•	Shift hub for binding

•	Shift collar for damage

•	Burred or damaged engagement teeth

•	Refer to Transfer Case Cleaning and Inspection .

2. Replace the shift collar assembly if it is faulty. Refer to Transfer Case Disassemble and Transfer Case Assemble .

Drive sprocket

1. Inspect for the following conditions:

•	Engagement teeth on the drive sprocket for burrs or damage

•	Worn bushing in the drive sprocket

•	Journal on the mainshaft for excessive wear or damage

•	Refer to Transfer Case Cleaning and Inspection .

2. Replace the drive gear if it is damaged. Refer to Transfer Case Disassemble and Transfer Case Assemble .
3. Replace the mainshaft if it is damaged. Refer to Transfer Case Disassemble and Transfer Case Assemble .