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.
Notice if you smell something burning coming from under the hood. This may be the result of an oil leak or even damaged electrical wiring (both serious, but not clutch-related issues), but it can also be a sign of a slipping clutch.
Push down on the clutch pedal. Your clutch may need to be replaced if it takes only a little of the pedal movement to disengage it. There should be an inch or two (2 to 4 cm) of free movement of the pedal before the clutch starts to disengage. If it disengages sooner, this is an indicator that your clutch is not riding (i.e., is not partially disengaged) when the pedal is not depressed.
Check the clutch fluid level. Check the clutch fluid reservoir, which is located near the brake master cylinder. The reservoir should either be filled to the top, or somewhere between the minimum and maximum lines shown on the reservoir. If necessary, add fluid to the reservoir. Some vehicles use the brake master cylinder for the clutch. If this is the case, make sure there is brake fluid in the master cylinder.
Take the car for a drive. See if it takes more RPMs from the engine to achieve a certain speed. This can also be an indicator your car needs a clutch replacement. While driving down the road in 3rd gear, put the car in 2nd gear, then let out the clutch. If the RPMs of the engine don't immediately go up, it may be time to replace the clutch.Diagnose a Slipping Clutch in Your Car Step 5Bullet1 Version 4.jpg Another way to establish if your clutch needs repair is to test it in a parking lot. Drive with the car in 3rd or 4th gear and, with your foot still on the accelerator, push the clutch in and release it. It should immediately come down in RPM. If the RPMs do not come down when you release, that means your clutch is worn out and slipping.Diagnose a Slipping Clutch in Your Car Step 5Bullet2 Version 4.jpg
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