Symptom |
Possible Sources |
Action |
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- Forward clutch damaged or worn.
REFER to: Forward Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
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- 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).
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- Direct clutch damaged or worn.
REFER to: Direct Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
- Damaged center support.
REFER to: Low/Reverse Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
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- Forward clutch damaged or worn.
REFER to: Forward Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
- Damaged center support.
REFER to: Forward Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
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- 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).
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- Forward clutch damaged or worn.
REFER to: Forward Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
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- No Forward and No Reverse
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- 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).
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- Delayed/Soft Forward and Reverse
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- Inspect the filter and pump assembly.
REFER to: Pump Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Description and Operation).
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- Low one-way clutch assembly damaged.
REFER to: Low One-Way Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
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- NOTE:
TFT must be greater than 38ºC (100ºF)
for the PCM to command the transmission fluid auxiliary pump on.
- Verify Fluid level.
REFER to: Transmission Fluid Level Check (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, General Procedures). If fluid level is ok, Clear any DTC,
then carry out prime procedure: Using a diagnostic scan tool, prime
the transmission fluid auxiliary pump. Using a diagnostic scan tool, Key
ON, Engine OFF, command TRANS_PMP_CMD to 80% for 30 seconds. Carry out a
road test until there is a stop/start event. If the restart is harsh,
repeat the Transmission Fluid Auxiliary Pump prime procedure. Continue
road test and evaluate each stop/start event. Repeat prime procedure
until three consecutive normal stop/start events are achieved. Clear DTCs. If the concern stills exists, follow symptom chart for harsh forward engagement.
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- No 1-2 Shift/Harsh/Soft/Slipping
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- Intermediate clutch damaged or worn.
REFER to: Intermediate Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Description and Operation).
- Forward clutch assembly damaged or worn.
REFER to: Forward Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
- Low one-way clutch assembly damaged.
REFER to: Low One-Way Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
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- No 2-3 Shift/Harsh/Soft/Slipping
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- Direct clutch damaged or worn.
REFER to: Direct Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
- Forward clutch assembly 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).
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- 2-3 Shift Hesitation After A Cold Soak
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- Verify Fluid level.
REFER to: Transmission Fluid Level Check (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, General Procedures).
If fluid level is
okay, these hesitation events should be deemed a normal characteristic
and do not cause any abnormal wear or durability concern. The hydraulic
circuit can partially drain back during an extended engine off condition
and could take a couple applications (2-3 shifts) to work any air out
of the hydraulic circuit. No further work on the transmission should
take place for that condition.
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- No 3-4 Shift/Harsh/Soft/Slipping
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- Overdrive clutch assembly damaged or worn.
REFER to: Overdrive Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
- Forward clutch assembly 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).
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- No 4-5 Shift/Harsh/Soft/Slipping
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- 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).
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- No 5-6 Shift/Harsh/Soft/Slipping
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- 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).
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- Only Gears 1,2,3,4 Available
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- Forward clutch assembly stuck on.
REFER to: Forward Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
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- Only Gears 3 and 5 Available
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- Direct clutch assembly stuck on.
REFER to: Direct Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
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- Only Gears 2 and 6 Available
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- Intermediate clutch assembly stuck on.
REFER to: Intermediate Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Description and Operation).
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- Only Gears 4,5,6 Available
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- Overdrive clutch assembly stuck on.
REFER to: Overdrive Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
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- Only Gears 1 and R Available
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- Low/reverse clutch stuck on.
REFER to: Low/Reverse Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
- Low one-way clutch assembly damaged.
REFER to: Low One-Way Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
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- Low/reverse clutch damaged or worn.
REFER to: Low/Reverse Clutch Assembly (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
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- Torque Converter Operation Concerns
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-
TCC damaged or worn.
REFER to: Torque Converter Clutch (TCC) (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
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- Always Applied (engine stalls)
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TCC damaged or worn.
REFER to: Torque Converter Clutch (TCC) (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
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TCC damaged or worn.
REFER to: Torque Converter Clutch (TCC) (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
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- Selector Lever High Effort
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- Selector lever cable routed wrong, binding or damaged.
REFER to: Selector Lever Cable - 1.5L EcoBoost (118kW/160PS) – I4 (307-05A Automatic Transmission External Controls - 6-Speed Automatic Transmission – 6F35, Removal and Installation).
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- Damaged or worn seals.
REFER to: Leakage Inspection (307-01A Automatic Transmission - 6-Speed Automatic Transmission – 6F35, Diagnosis and Testing).
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- Engine drive accessories, suspension, CV joints,
REFER to: Noise, Vibration and Harshness (NVH) (100-04 Noise, Vibration and Harshness, Diagnosis and Testing).
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- Engine drive accessories, suspension, CV joints, transmission fluid cooler tubes,
REFER to: Noise, Vibration and Harshness (NVH) (100-04 Noise, Vibration and Harshness, Diagnosis and Testing).
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- Inspect the selector lever cable for correct adjustment.
REFER
to: Selector Lever Cable Adjustment (307-05 Automatic Transmission
External Controls - 6-Speed Automatic Transmission – 6F15)
.
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- INSPECT the manual control lever for damage, wear or 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)
.
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- INSPECT the park pawl, park 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)
.
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- INSPECT 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)
.
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- 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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