Inspection of the Front Box

eP4 DM 18.05.004
  1. Check the ground underneath the front box for oil leaks.
  2. Check the ground underneath the front box and along the chassis for coolant leaks.
  3. Open the hood.
    Check the power steering reservoir fluid level.
    The power steering fluid level should be between the MIN COLD mark and the middle mark just above it. See Fig. .
    If needed, fill the reservoir with automatic transmission fluid that meets Dexron III or TES-389 specifications.

    Note:  Typical reservoir shown; configurations may vary.

    1. Filler Cap

    2. MAX Fill Line

    3. COLD MIN Fill Line

    Fig. 1, Power Steering Fluid Reservoir

    4. Important: The surge tanks must be cool to check the coolant levels.

    Notice: Coolant must be filled to the COLD MAX line of the surge tanks. Low coolant could result in overheating, which could cause component damage.

  4. Check the coolant level in the eDrive surge tank. See Fig. .
    If the coolant is low, fill the tank to the COLD MAX line with a 50/50 mixture of water and the type of antifreeze currently installed in your vehicle.

    1. COLD MIN Fill Line

    2. COLD MAX Fill Line

    3. Surge Tank

    Fig. 2, Coolant Surge Tank (one of two tanks)

  5. Check the coolant level in the battery surge tank. See Fig. .
    If the coolant is low, fill the battery system surge tank to the COLD MAX line with a 50/50 mixture of water and the type of antifreeze currently installed in your vehicle.
  6. Inspect visible wiring for damage or looseness. Check for loose wiring, chafed insulation, and damaged or loose hold-down clamps.
  7. Inspect visible frame rails for missing bolts, shiny areas, or rust streaks.
  8. Close the hood.
Note:
Parent topic: Daily Pre-Trip Inspections and Maintenance
Document Number: 0000087045
Manual Publication Date: 2024-03-21
Topic Publication Date: 2025-02-13