Ford Fusion Quiz
Powertrain

Symptom Diagnosis. Diagnosis and Testing

In this manual: Powertrain
General Information — 26Chassis — 150Powertrain — 282Electrical — 271Body and Paint — 300
~9min read

Symptom Chart

Symptom Chart: Automatic Transmission

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).

In most cases, the PCM sets a DTC to aid diagnosis. Refer to the Diagnostic Trouble Code Chart before using the Symptom Chart.

Symptom Possible Sources Action
  • Interaction Concerns
  • No Forward
  • Forward clutch damaged or worn.
    REFER TO: Forward Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • No Reverse
  • Direct clutch damaged or worn.
    REFER TO: Direct Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • Low/reverse clutch damaged or worn.
    REFER TO: Low/Reverse Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • Harsh Reverse
  • Direct clutch damaged or worn.
    REFER TO: Direct Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • Center support damaged.
    REFER TO: Low/Reverse Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • Harsh Forward
  • Forward clutch damaged or worn.
    REFER TO: Forward Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • Center support damaged.
    REFER TO: Forward Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • Delayed/Soft Reverse
  • Direct clutch damaged or worn.
    REFER TO: Direct Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • Low/reverse clutch damaged or worn.
    REFER TO: Low/Reverse Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • Delayed Soft/Forward
  • Forward clutch damaged or worn.
    REFER TO: Forward Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • No Forward and Reverse
  • Check the transmission fluid level.
    REFER TO: Transmission Fluid Level Check (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, General Procedures).
  • Inspect the filter and pump assembly.
    REFER TO: Pump Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Description and Operation).
  • Delayed/Soft Forward and Reverse
  • Inspect the filter and pump assembly.
    REFER TO: Pump Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Description and Operation).
  • Neutral After Start
  • Low one-way clutch damaged.
    REFER TO: Low One-Way Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • Harsh Stop/Start
  • NOTE: TFT must be above 38ºC (100ºF) for the PCM to command the auxiliary transmission fluid pump on.
  • Check the fluid level.
    REFER TO: Transmission Fluid Level Check (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, General Procedures).
    If the fluid level is correct, clear all DTCs, then perform the priming procedure: Using the diagnostic scan tool, prime the auxiliary transmission fluid pump. With the scan tool, ignition ON, engine OFF, command TRANS_PMP_CMD to 80% for 30 seconds. Perform a road test until a stop/start event occurs. If the stop/start is harsh, repeat the auxiliary transmission fluid pump priming procedure. Continue the road test and evaluate each stop/start event. Repeat the primary procedure until three consecutive normal stop/start events are achieved. Clear the DTCs. If the concern is not resolved, follow the Harsh Forward Engagement symptom chart.
  • Shift Concerns
  • No 1-2 Shift/Harsh/Soft/Slipping
  • Intermediate clutch damaged or worn.
    REFER TO: Intermediate Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Description and Operation).
  • Forward clutch damaged or worn.
    REFER TO: Forward Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • Low one-way clutch damaged.
    REFER TO: Low One-Way Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • No 2-3 Shift/Harsh/Soft/Slipping
  • Direct clutch damaged or worn.
    REFER TO: Direct Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • Forward clutch damaged or worn.
    REFER TO: Forward Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • Intermediate clutch damaged or worn.
    REFER TO: Intermediate Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Description and Operation).
  • 2-3 Shift Hesitation After Cold Soak
  • Check the fluid level.
    REFER TO: Transmission Fluid Level Check (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, General Procedures).
    If the fluid level is correct, these fluctuations should be considered normal characteristics and do not cause abnormal wear or durability concerns. The hydraulic circuit may partially drain back during extended engine-off periods, and it may take a few applications (2-3 shifts) to bleed air from the hydraulic circuit. No further transmission work should be performed for this condition.
  • No 3-4 Shift/Harsh/Soft/Slipping
  • Overdrive clutch damaged or worn.
    REFER TO: Overdrive Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • Forward clutch damaged or worn.
    REFER TO: Forward Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • Direct clutch damaged or worn.
    REFER TO: Direct Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • No 4-5 Shift/Harsh/Soft/Slipping
  • Direct clutch damaged or worn.
    REFER TO: Direct Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • Overdrive clutch damaged or worn.
    REFER TO: Overdrive Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • Forward clutch damaged or worn.
    REFER TO: Forward Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • No 5-6 Shift/Harsh/Soft/Slipping
  • Intermediate clutch assembly damaged or worn.
    REFER TO: Intermediate Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission 6F35, Description and Operation).
  • Direct clutch assembly damaged or worn.
    REFER TO: Direct Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission 6F35, Diagnosis and Testing).
  • Only gears 1, 2, 3, 4 available
  • Forward clutch assembly stuck.
    REFER TO: Forward Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission 6F35, Diagnosis and Testing).
  • Only gears 3 and 5 available
  • Direct clutch assembly stuck.
    REFER TO: Direct Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission 6F35, Diagnosis and Testing).
  • Only gears 2 and 6 available
  • Intermediate clutch assembly stuck.
    REFER TO: Intermediate Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission 6F35, Description and Operation).
  • Only gears 4, 5, 6 available
  • Overdrive clutch seized.
    REFER TO: Overdrive Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission 6F35, Diagnosis and Testing).
  • Only gears 1 and R available
  • Low/reverse clutch seized.
    REFER TO: Low/Reverse Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission 6F35, Diagnosis and Testing).
  • Low one-way clutch damaged.
    REFER TO: Low One-Way Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission - 6F35, Diagnosis and Testing).
  • No engine braking at low speeds
  • Low/reverse clutch damaged or worn.
    REFER TO: Low/Reverse Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission 6F35, Diagnosis and Testing).
  • Torque converter operating problems
  • Does not apply
  • TCC damaged or worn.
    REFER TO: Torque Converter Clutch (TCC) (307-01A Automatic Transmission - 6-Speed Automatic Transmission 6F35, Diagnosis and Testing).
  • Always applied (engine stalls)
  • TCC damaged or worn.
    REFER TO: Torque Converter Clutch (TCC) (307-01A Automatic Transmission - 6-Speed Automatic Transmission 6F35, Diagnosis and Testing).
  • Chatter/shudder/bind
  • TCC damaged or worn.
    REFER TO: Torque Converter Clutch (TCC) (307-01A Automatic Transmission - 6-Speed Automatic Transmission 6F35, Diagnosis and Testing).
  • Other Concerns
  • Stiff shift lever
  • Shift lever cable incorrectly routed, kinked or damaged.
    REFER TO: Shift Lever Cable - 1.5 L EcoBoost (118 kW/160 L hp) - I4 (307-05A External Controls Automatic Transmission - 6-Speed Automatic Transmission 6F35, Removal and Installation).
  • External leaks
  • Damaged or worn seals.
    REFER TO: Leak Check (307-01A Automatic Transmission - 6-Speed Automatic Transmission 6F35, Diagnosis and Testing).
  • Noise
  • Engine drive accessories, suspension, CV joints,
    REFER TO: Noise, Vibration and Harshness (NVH) (100-04 Noise, Vibration and Harshness, Diagnosis and Testing).
  • Vibration
  • Engine drive accessories, suspension, CV joints, transmission fluid cooler lines,
    REFER TO: Noise, Vibration and Harshness (NVH) (100-04 Noise, Vibration and Harshness, Diagnosis and Testing).
  • No park range
  • Check the shift lever cable adjustment.
    REFER TO: Shift Lever Cable Adjustment (307-05 Automatic Transmission External Controls - 6-Speed Automatic Transmission 6F15).
  • CHECK the manual lever for damage, wear and correct installation.
    REFER TO: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission 6F35, Overhaul).
    REFER TO: Transmission (307-01 Automatic Transmission - 6-Speed Automatic Transmission 6F15).
  • CHECK the parking pawl, parking pawl actuator and TR sensor for damage or wear.
    REFER TO: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission 6F35, Overhaul).
    REFER TO: Transmission (307-01 Automatic Transmission - 6-Speed Automatic Transmission 6F15).
  • CHECK the final drive differential and final drive chain for damage.
    REFER TO: Transmission (307-01A Automatic Transmission - 6-Speed Automatic Transmission 6F35, Overhaul).
    REFER TO: Transmission (307-01 Automatic Transmission - 6-Speed Automatic Transmission 6F15).
  • Overheating
  • Transmission fluid cooling system damaged.
    REFER TO: Transmission Cooling (307-02A Transmission Cooling - 6-Speed Automatic Transmission 6F35, Diagnosis and Testing).

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A quick Ford Fusion quiz: every answer comes with an explanation and a link to the manual page.