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Clutch Slipping

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
Cause Action
DEFINITION: The clutch does not engage completely after the pedal is released, after shifting gears or the clutch slips during maximum engine loads, such as climbing hills or high vehicle speeds. Clutch slipping is identified by increase in engine RPM without increase in vehicle speed.
Review the Symptoms - Clutch  and perform the necessary inspections.
Incorrect clutch pedal height, not allowing the clutch master cylinder to return Adjust the clutch pedal position switch. Refer to Clutch Pedal Position Sensor Replacement .
The clutch pedal return spring is broken or missing. Replace the clutch pedal return spring, if equipped. Refer to Clutch Pedal Replacement .
The clutch pedal is binding or sticking.
  1. Clear away any items that may be contacting the pedal.
  2. Inspect the pedal bushings for ease of movement.
  3. Replace the clutch pedal if it is faulty. Refer to Clutch Pedal Replacement .
Clutch master cylinder binding or seized Replace the clutch master cylinder. Refer to Clutch Master Cylinder Replacement (Left Hand Drive) Clutch Master Cylinder Replacement (Right Hand Drive) .
Clutch actuator cylinder binding or seized Replace the clutch actuator cylinder. Refer to Clutch Actuator Cylinder Replacement .
Kinked or damaged clutch actuator cylinder front pipe
  1. Inspect for the correct routing of the clutch actuator cylinder front pipe.
  2. Route the clutch actuator cylinder front pipe properly.
  3. Inspect for loose or faulty engine mounts that may allow the clutch actuator cylinder front pipe to be kinked or pinched.
  4. Repair or replace faulty engine mounts.
  5. Replace the clutch actuator cylinder front pipe if it is damaged. Refer to Clutch Actuator Cylinder Front Pipe Replacement (Left Hand Drive) Clutch Actuator Cylinder Front Pipe Replacement (Right Hand Drive) .
Grease or oil contamination of the clutch disc
  1. Repair the source of the oil leak.
  2. Repair the source of the grease leak.
  3. Clean the contamination from the clutch components.
  4. If contaminants cannot be removed, replace the clutch assembly. Refer to Clutch Pressure and Driven Plate Replacement .
Oil-soaked clutch disc Correct the leak at its source and install a new clutch disc.
Weak diaphragm spring Replace the clutch assembly. Refer to Clutch Pressure and Driven Plate Replacement 
Driven plate that is not seated Start the engine 30 - 40 times. Do not overheat the engine.
Driven plate is overheated Allow the driven plate to cool.
Worn or damaged flywheel Replace the engine flywheel.
Worn clutch disc facing Replace the clutch assembly. Refer to Clutch Pressure and Driven Plate Replacement 
Burnt or glazed clutch discs Replace the clutch assembly. Refer to Clutch Pressure and Driven Plate Replacement 
Improper resurfacing of the flywheel Replace the flywheel if it has been improperly resurfaced, allowing contact of the clutch disc hub or insufficient clamping load of the pressure plate.
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