If you drive a car with a clutch this is some useful information that might help you notice if your clutch is slipping.
For many drivers, shifting a standard transmission automobile is an essential part of the driving experience. Unfortunately, if you drive in a highly congested area with many stops, you may have developed some bad shifting habits that can result in a slipping clutch or stripped gears. You could read books, or even go to school to learn how to diagnose a slipping clutch, but here’s a start in terms of identifying this issue. These details refer specifically to hydraulically operated clutch mechanisms, and may not apply to clutches with mechanical linkages.
Steps 1
Be aware of your clutch’s action. Although a clutch/pressure plate system wears gradually over time, eventually the clutch’s performance may become noticeably diminished, and by paying close attention to how it engages, slippage should be apparent to a competent driver. Here are some simple signs to watch for: Change in engine speed without noticeable acceleration. If you rev your engine and the car hesitates before accelerating, it can mean your clutch isn’t delivering the boost in RPM through the transmission to the drive wheels. Change in the clutch pedal height where the driver feels the clutch begin to engage. Change in perceived engine power when pulling a load. A slipping clutch reduces the amount of power delivered to the drive wheels.
Go here to read the full article: http://www.wikihow.com/Diagnose-a-Slipping-Clutch-in-Your-Car
Also a video on the subject……