* Worn Clutch Disc: This is the most common cause. The friction material on the clutch disc wears down over time and with use. When it's worn, it can't grip the flywheel properly, leading to slippage. You'll likely notice this most when accelerating uphill or under heavy load.
* Worn Pressure Plate: The pressure plate pushes the clutch disc against the flywheel. If the springs in the pressure plate weaken, it won't apply enough pressure, causing slippage.
* Leaking Slave Cylinder or Master Cylinder: These cylinders control the hydraulics that operate the clutch. A leak reduces hydraulic pressure, preventing the clutch from fully disengaging or engaging. You might notice a low clutch pedal or a spongy pedal.
* Worn Throwout Bearing: This bearing spins with the input shaft and presses against the pressure plate when you depress the clutch pedal. If it's worn, it might not release the pressure plate fully, leading to slippage or a noisy clutch.
* Damaged Flywheel: A damaged or warped flywheel prevents the clutch disc from making proper contact. This could be from overheating or previous clutch problems.
* Clutch Cable Adjustment (if applicable): While less common in later models, some Cavaliers might have a cable-operated clutch. An improperly adjusted cable can prevent the clutch from engaging completely.
It's crucial to have a mechanic diagnose the problem. Simply stating the transmission is slipping doesn't pinpoint the exact cause. A mechanic can inspect the clutch system, check for leaks, and determine the necessary repairs. Ignoring a slipping clutch can lead to more extensive and costly damage to the transmission.
