High/Low Range Components
WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
- Clean the annulus gear in cleaning solvent and air dry.
- Inspect the annulus gear teeth for the following conditions:
- Damage or excessive wear
- Chipped
- Debris embedded in the root of the teeth
- Replace the annulus gear if it is faulty.
- Clean the high/low range shift sleeve in cleaning solvent and air dry.
- Inspect the high/low range shift sleeve for the following conditions:
- Excessive wear or roughness on the shift fork pad surface (2)
- Damaged, chipped or excessive wear on the engagement teeth (3)
- Excessive looseness or gouging on the mainshaft splines (1)
- Clean the high/low planetary carrier in cleaning solvent. Do not disassemble the planetary carrier.
- Air dry, and ensure all cleaning solvent is removed from the bearings in the planetary gears (1). Do not spin the planetary gears with compressed air.
- Inspect the planetary gears for chipped teeth.
- Inspect the planetary gears for debris embedded in the root of the teeth.
- Inspect the planetary gears for excessive side movement from worn bearings or shafts.
- Inspect the low range teeth (2) for damage or excessive wear.
- Inspect the high range teeth (3) for damage or excessive wear.
- Inspect the input seal surface (4) for scoring or excessive wear.
- Inspect the thrust washer surface for scoring or excessive wear.
- Replace the high/low planetary carrier if any of the above conditions are found.
- Inspect the mainshaft front support bearing for the following conditions:
- Scoring
- Pitting
- Brinelling
- Excessive wear
- Replace the mainshaft front support bearing if it is faulty. Refer to Transfer Case Disassemble and Transfer Case Assemble .
- Inspect the high/low planetary thrust washer for excessive wear or scoring.
- Replace the thrust washer if it is faulty.