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Home >> Lincoln >> 2019 >> Nautilus Base, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Automatic Transmission - 8-Speed Automatic Transmission - 8F57 (2 Of 2)) >> Diagnosis And Testing >> Diagnosis By Symptom >> Pinpoint Tests >> Pinpoint Test C : No Engagement - Both Forward And Reverse

Pinpoint Test C : No Engagement - Both Forward And Reverse

WARNING: This page is about a different variant/trim than selected.
  1. Normal Operation and Fault Conditions 

    • No forward and no reverse 

      • Collect a transmission fluid sample and inspect it for signs of contamination or wear. REFER to: Preliminary Inspection .

      • Carry out the line pressure test. If line pressure is low, refer to the Line Pressure Diagnosis Chart for further diagnosis. REFER to: Special Testing Procedures  .

      • Inspect the turbine shaft splines on the transmission input shaft and in the torque converter turbine. INSTALL new components as necessary. REFER to: Transmission  .

      • Inspect the internal transmission components for damage. INSTALL new components as necessary. REFER to: Transmission  .

    Possible Sources 

    • Low transmission fluid level
    • Low line pressure
    • Clutch fault
    • Damaged turbine shaft splines
    • Internal transmission components

  2. Diagnostic steps are not provided for this symptom or DTC. REFER to: Diagnostic Methods 
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